2010 chevy equinox p0420

P0300 is a generic OBDII code that can occur with the Chevy Equinox. This code indicates that your vehicle’s engine is misfiring and can be a drivability threat. P0300 is often accompanied by cylinder-specific misfire codes (P030X, where the X indicates the cylinder number that is misfiring). If you have P0300 and a cylinder-specific misfire ...

2010 chevy equinox p0420. P0621 Code: Generator Lamp L Control Circuit Malfunction - In The Garage with CarParts.com. Discover what the P0621 code means, its triggers, associated symptoms, and what you can do to resolve this trouble code.

Next, a scan tool check. First to verify the presence of the P0420 and/or P0430 DTCs but to also check for any others that might be recorded in the ECM. Any DTC or condition that increases emissions or affects sensor readings can cause a converter to fail the ECM tests even if the converter is good.

I have a 2010 equinox with around 138k miles, Direct Injection 4 cylinder. Its an AWD version (LT). I've been proactive in keeping up with maintenance on the car, though, non related, never did a transmission flush as it was noted i think that this really isnt needed due to the type of system the car has.I have a 2011 Chevy equinox, these codes keep coming up p0138, P0341, p0420, p0340. I had issues with jerking when idle, rpm’s are high when accelerating after getting to speed they drop, sometimes when stopped at light and then try and accelerate the car shuts off. I had the car looked at buy pep boys.The P0008 code indicates an issue concerning the position of the camshaft and crankshaft. In an internal combustion engine, the timing between these two is crucial as it helps determine the efficiency of the engine.If your OBD-II scanner registers this code, you must address it immediately.After driving it for an extended period, it will lope / lunge in Park and Neutral as well as in any gear. So it doesn't seem to be transmission related. Here are the codes; P228D – Fuel Pressure Regulator 1 exceeded control limits – Pressure too high. P0089 – Fuel Pressure Regulator Performance.Mar 13, 2023 · OBD II fault code P0420 is a generic code that is defined as “Catalyst System Efficiency Below Threshold (Bank 1)”, and is set when the PCM (Powertrain Control Module) detects a condition that indicates that the catalytic converter on Bank 1 is operating below the minimum allowable efficiency threshold. Note that on engines with two banks ... Dec 2, 2020 · You may ever experience troubleshooting, such as P0420 Chevy equinox. It happens after your car is connected to the scanner. The code appears to indicate there is an issue related to catalyst system efficiency. Based on this result, it seems your issue comes from the catalytic converter. It is capable to scrub pollution, so the emission is free ...

How to diagnose code P0420 on a Chevrolet Equinox. Typically, you'll find out about P0420 because your malfunction indicator lamp or "check engine light" turned on & you or a mechanic diagnosed the problem with an OBD II code scanner like this one from Bluedriver. You may experience a very slight reduction in engine power from reduced exhaust ...My 2011 Chevy Equinox is having the same issues as well, stahling i have to warm it up before i can drive it. I've had the catalytic converter replaced the ECM module replaced all 4 cylinders replaced the high pressure fuel pump was a recall on it that was replaced and the exhaust manifold and the intake and exhaust cam acuator the throttle body.2,551 satisfied customers. P0300 and p0420 on a 2011 Chevy equinox 2.4L LS. 105000. plugs, coils, crank sensor and both o2s have been replaced and well as exhaust manifold and ECU … read more.Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. 1 (855) 347-2779 · [email protected]. Read FAQ. GET A QUOTE. P2097 code definition P2097 is a general OBD-II diagnostic trouble code that indicates a fault with the post catalyst fuel trim system being too rich in bank 1.The P0325 code may cause some alarm, but it’s not normally a big deal. Instead, this code is telling you that there’s something either wrong with the knock sensor or the wiring to the sensor. In rare cases, there could be a fault with the PCM, but this doesn’t happen often, and when it does, there are generally other symptoms.I have a 2011 Chevy equinox, these codes keep coming up p0138, P0341, p0420, p0340. I had issues with jerking when idle, rpm’s are high when accelerating after getting to speed they drop, sometimes when stopped at light and then try and accelerate the car shuts off. I had the car looked at buy pep boys.Feb 7, 2019 · P0138 is a common OBDII code that occurs in many vehicles, including the Chevy Equinox. The code is triggered when: The voltage at the sensor remains above threshold for 20 seconds or more. Voltage to the sensor is to high (wiring problem, think short) Bad O2 sensor itself. There are also some less likely problems that can cause P0138.

In this video I bring you along as I have a look at a customers Chevy equinox with the classic P0010 Intake cam position solenoid control circuit. It is a ve...Re: 08 Equinox Sport P0420 code NIGHTMARE Where did you purchase this car - a Chevy dealer, another dealer, or a generic used car lot ? 2018 Equinox LT1 1.5 L 4 cyl, AWD, S/R Cajun Red Tintcoat/Black 2010 Equinox LTZ 2.4 L 4 cyl, FWD, S/R Cardinal Red/BlackOct 31, 2019 · Replied by chad on topic Intermittent P0089, P228D 2011 Chevy Equinox 2.4 AWD. The fuel rail pressure sensor detects fuel pressure within the fuel rail. The engine control module (ECM) provides a 5 V reference voltage on the 5 V reference circuit and ground on the low reference circuit. The ECM receives a varying signal voltage on the signal ... Nov 4, 2015 · P0300 and p0420 on a 2011 Chevy equinox 2.4L LS. 105000. plugs, coils, crank sensor and both o2s have been replaced and well as exhaust manifold and ECU … read more

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The vehicle ran fine until a week after the P0420 code returned and I noticed when I drive near a building, like a drive-through bank stall that I can hear the engine idling with a grumbly tone. ... Chevy Equinox, and Cadillac SRX owners and enthusiasts. Come join the discussion about modifications, classifieds, troubleshooting, maintenance ...EricTheCarGuy Explains Check Engine Codes - P0420 Catalyst System Efficiency Below Threshold. =============================Claim your FREE …A P2714 can affect vehicles from Toyota, Chevrolet, Lexus, Nissan, Acura, Mercedes-Benz, and many more. See also P0796 Code: Pressure Control Solenoid "C" Performance / Stuck Off A vehicle’s powertrain control module (PCM) can store a P2714 code if it detects a problem with the transmission pressure solenoid “D.”P0420 definition : Catalyst system efficiency below threshold (Bank 1) Issue Severity: MODERATE – Extended driving with this code can cause internal engine damage. Repair Urgency: Get this code fixed as soon as possible to avoid further damage to your emission system and possible engine damage. Diagnosis: The most common cause of …As the code description implies the P0420 code means that the vehicle's control module has detected that the three-way catalytic converter is not working ...

2011 Terrain P0420, P0016, P0089, P228D Engine Power Reduced. My Terrain basically died yesterday and I'm going to be getting it towed to the dealer tomorrow, but wanted to get an idea of what I might be in for. The CEL lit up a few weeks ago with the first code, P0420, the Catalytic Converter Bank 1 was below the efficiency threshold.2010 equinox went into limp mode, strong exhaust smell, rough idle, ... I have a 2011 chevy equinox with the 2.4l. I have codes p0420, p0455, p0013. ... I have a 2010 Chevy equinox with a 2.4 in my shop first time I have dealt with the high pressure fuel injection, ...Mar 31, 2017 · Well unfortunately when i went the route of GM they told me that my VIN number didnt apply to the recall. Also.. when going to the local shop, using the gauge to test it, it seemed to show everything was in the correct range and likely not the HPFP.. unless the gauge test can be "ok" and the pump still have an issue.. P0030 P0036 P0443 P0102 Is the faults codes i got. I dont know. I just purchased the vehicle. 2010 chevrolet cobalt 2.2. - Answered by a verified Chevy MechanicStep 1 – Resolve Engine Trouble Codes. The first step is to resolve any other codes that may have come up in addition to the P0420; especially troublesome is the P0300 series of cylinder misfire codes. A P0300 code could be related to something in the ignition (spark plug or coil), the fuel injector, compression or fuel contamination.P0172 is triggered by the engine bank 1 “upstream” oxygen sensor and P0175 is triggered by the engine bank 2 “upstream” oxygen sensor. The oxygen sensor alerts your system when the condition is too rich meaning there’s too much fuel int the exhaust stream or too little oxygen in the exhaust stream. The symptoms and causes will help ...If you encounter a Chevrolet Equinox P0171 or GMC Terrain P0171 trouble code, you should know that there are several issues that can cause this problem. Shops report issues with the intake manifold gasket, warped intake manifold, clogged fuel injectors and faulty MAF sensors.Chevrolet Equinox P0016 definition: The correlation of the camshaft and crankshaft positions on bank 1 is incorrect based on the intake camshaft position sensor. Repair Urgency: Fix this code immediately (same day if possible) to avoid internal engine damage. Diagnosis: This trouble code can cause the vehicle to be hard to start and run rough.

Code P0455 may appear on some Chevy vehicles. On a 2010 Chevrolet Silverado 1500 LS 5.3L V8, for example, this DTC is set when “the EVAP system is not able to achieve or maintain a calibrated level of vacuum within a set amount of time.” The code appears in a 2010 Chevrolet Silverado 1500 5.3L V8 because of the following conditions:

WHAT CAUSES CODE P0420 ENGINE LIGHT CHEVROLET, CHEVY, GMC, BUICK, CADILLAC Great Car Scanner: https://amzn.to/2QmNBri Check out our Amazon Store for the to...1999 White C5 Coupe · #2 · Apr 25, 2015. gos333 said: 2011 Equinox, AWD, 107,000 miles has P0420 MIL code needs new cat converter. Dealer wants 1600.00.... reason the cat went out was excessive oil consumption which clogged the ceramic inside of the cat, evidently you have to remove the transfer case to replace the cat also.Model Year. RPO. Description. From. To. Chevrolet. Equinox. 2010 2011. LAF 2.4L Engine. GMC. Terrain. 2010 2011. LAF 2.4L Engine.P0420, P162B, P2617. please advise - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them.Some details about my traverse.. 2010 LT AWD, 258,751 miles. same engine and transmission. added tow package many years ago (bigger tranny cooler, upgraded fuse block tow wiring harness) I have drained and filled tranny handful of times since then.. I believe changing tranny fluid every year is in order for these cars but the experts may differ.Apr 2, 2018 · D. dell30rb Discussion starter · Apr 2, 2018. 2011 Equinox 2.4L is throwing code P0420 repeatedly. Runs fine and no other codes. New o2 sensors. Has 185,000 miles on it and now on engine #3 so its time to replace. Those engines have burned a lot of oil as we all know and i'm sure the cat is coked up with junk. Code P0172 may appear on some Chevy vehicles. On a 2016 Chevrolet Equinox L 2.4L L4, for example, this DTC is set if the average long term fuel trim weighted average value is greater or less than a calibrated value. To learn more about long and short term fuel trim, read our detailed explanation here. What Does “Bank 1” Mean in P0172?P0420 Code: Catalyst System Efficiency Below Threshold (Bank 1) - In The Garage with CarParts.com Find out what a P0420 code means, how to diagnose this problem and the common fixes that you can do to resolve this trouble code.

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Jul 26, 2018 · Chevy Equinox P0420: Meaning, Causes, + How to Fix. This page is meant to help you troubleshoot the Chevy Equinox P0420 trouble code. It covers the P0420 code’s meaning, symptoms, causes, and possible solutions. P0420 is the most common OBDII code and is virtually never a breakdown risk. When there is a large leak in the Chevy Equinox’s EVAP system, it will throw the P0455 OBDII Code. P0455 indicates a large leak in the evaporative emission control system. (EVAP). There are different leak size codes. For example, P0456 means your Equinox has a small EVAP leak. While the trouble code may state that there is a “large leak ...2011 Terrain P0420, P0016, P0089, P228D Engine Power Reduced. My Terrain basically died yesterday and I'm going to be getting it towed to the dealer tomorrow, but wanted to get an idea of what I might be in for. The CEL lit up a few weeks ago with the first code, P0420, the Catalytic Converter Bank 1 was below the efficiency threshold.2010 Chevrolet Equinox setting P0016, P0017, P0011 and P0014. Recently changed the intake and exhaust camshaft actuator solenoid and the dealership recently changed the high pressure fuel pump. Car ra … read moreFeb 21, 2017 · 2010 chevy equinox 2.4l getting codes p0089 and p228d. desired fuel rail pressure on the scanner is 3mpa and the acutal fuel rail pressure is 15mpa. Also theres a chirp type noise that sounds to be co … Jul 26, 2018 · Chevy Equinox P0420: Meaning, Causes, + How to Fix. This page is meant to help you troubleshoot the Chevy Equinox P0420 trouble code. It covers the P0420 code’s meaning, symptoms, causes, and possible solutions. P0420 is the most common OBDII code and is virtually never a breakdown risk. Dec 16, 2018 · Chevy equinox 2011: code p0420. americanfoxusa. Dec 16, 2018. Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission. Dec 16, 2018. #1. A. The most common cause of a P0420 code is a worn catalytic converter, but this can differ depending on your specific model. These can cost over $1000 to replace, so before you replace it, make sure it really needs to be replaced. There are 4 main causes of P0420 that we need to check. Click on sections below to learn more about each possible cause. D. dell30rb Discussion starter · Apr 2, 2018. 2011 Equinox 2.4L is throwing code P0420 repeatedly. Runs fine and no other codes. New o2 sensors. Has 185,000 miles on it and now on engine #3 so its time to replace. Those engines have burned a lot of oil as we all know and i'm sure the cat is coked up with junk.P0420 is a diagnostic trouble code (DTC) for "Catalyst System Efficiency Below Threshold (Bank 1)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic ... ….

Bad VVT Solenoid Symptoms: What You Need to Know - In The Garage with CarParts.com. What is a variable valve timing (VVT) solenoid and how does it work? What are the common symptoms to look out for when it fails?This includes the Chevy Equinox. VVT adjusts the position of the camshaft (s) to maximize the combustion efficiency of the motor. P0014 means that the camshaft position is too far advanced from where it should be in relation to normal operating specs. Before doing anything, check your Equinox’s oil level. Low oil is the number one cause …Jan 4, 2020 · 2012 Chevy equinox 2.4L at about 135K miles threw a fan belt about 6 months ago on a road trip. Limped it to a dealership for fanbelt replacement and they said the timing chain was making a lot of noise and need replaced too. So I got it back home and had a shop do the timing chain with new tensioners and guide vanes as well as new water pump. P0420 definition : Catalyst system efficiency below threshold (Bank 1) Issue Severity: MODERATE – Extended driving with this code can cause internal engine damage. Repair Urgency: Get this code fixed as soon as possible to avoid further damage to your emission system and possible engine damage. Diagnosis: The most common cause of …Chevrolet Equinox P0016 definition: The correlation of the camshaft and crankshaft positions on bank 1 is incorrect based on the intake camshaft position sensor. Repair Urgency: Fix this code immediately (same day if possible) to avoid internal engine damage. Diagnosis: This trouble code can cause the vehicle to be hard to start and run …What is the Cost to Diagnose the Code P2097 Chevrolet? Labor: 1.0. The cost to diagnose the P2097 Chevrolet code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.Jan 5, 2014 · FFV 6-speed Automatic. Check engine code p0420 bank #1 - 2012 Chevrolet Equinox LS 4dr SUV 2.4L 4-cyl. FFV 6-speed Automatic. Posted by Anonymous on Jan 05, 2014. Leaded fuel was used where unleaded was called for. An oxygen sensor is not reading (functioning) properly. The engine coolant temperature sensor is not working properly. As the code description implies the P0420 code means that the vehicle's control module has detected that the three-way catalytic converter is not working ...@Gabriel Diego Not every P0420 is a perfectly accurate, irrefutable analysis of catalytic converter health. Prolonged improper Air/Fuel Ratios can temporarily deplete the Oxygen Storage Capacity in a catalyst, the odd occasional glitch in a drive-cycle monitor, and a host of other things.Replied by Chad on topic Intermittent P0089, P228D 2011 Chevy Equinox 2.4 AWD. The fuel rail pressure sensor detects fuel pressure within the fuel rail. The engine control module (ECM) provides a 5 V reference voltage on the 5 V reference circuit and ground on the low reference circuit. The ECM receives a varying signal voltage on the … 2010 chevy equinox p0420, 2014 Chevy Equinox P0420. Thread starter possum328; Start date Sep 8, 2023; 1; 2; Next. 1 of 2 Go to page. Go. Next Last. P. possum328. Joined Feb 1, 2012 Messages 164 Location MN. Sep 8, 2023 #1 Just replaced the intake and exhaust VVT solenoids a few days ago and have driven a couple hundred miles since then. Today …, The most common cause of a P0420 code is a worn catalytic converter, but this can differ depending on your specific model. These can cost over $1000 to replace, so before you replace it, make sure it really needs to be replaced. There are 4 main causes of P0420 that we need to check. Click on sections below to learn more about each possible cause. , Mar 31, 2017 · Well unfortunately when i went the route of GM they told me that my VIN number didnt apply to the recall. Also.. when going to the local shop, using the gauge to test it, it seemed to show everything was in the correct range and likely not the HPFP.. unless the gauge test can be "ok" and the pump still have an issue.. , Feb 23, 2019 · Replied by Tyler on topic Chevrolet Equinox Set A Code p228D and p0089 Reduced Engine Power I like pole71's suggestion to investigate the rail pressure sensor. A quick check is to run the low pressure pump, observe the low pressure sensor, and compare to the rail pressure sensor. , When there is a large leak in the Chevy Equinox’s EVAP system, it will throw the P0455 OBDII Code. P0455 indicates a large leak in the evaporative emission control system. (EVAP). There are different leak size codes. For example, P0456 means your Equinox has a small EVAP leak. While the trouble code may state that there is a “large leak ..., Make a huge impression with the 2024 Chevy Equinox small SUV equipped with a 1.5L turbocharged engine, standard Chevy Safety Assist, and a details-focused interior. ... Not only does Equinox have powerful looks, it has the goods under the hood to make every trip fun and everyday driving exciting., 2014 Chevrolet Equinox. Asked by Visitor in Troy, NY on January 12, 2020. My 2014 Chevrolet Equinox keeps showing P0420 Code My car was brought to dealership for fixing and they charged me 1400.00 for a manifold when I google the code it says catalyst converter and a day after picking up my car the check engine light came back on, did they ..., After driving it for an extended period, it will lope / lunge in Park and Neutral as well as in any gear. So it doesn't seem to be transmission related. Here are the codes; P228D – Fuel Pressure Regulator 1 exceeded control limits – Pressure too high. P0089 – Fuel Pressure Regulator Performance., As the code description implies the P0420 code means that the vehicle's control module has detected that the three-way catalytic converter is not working ..., Just replaced the intake and exhaust VVT solenoids a few days ago and have driven a couple hundred miles since then. Today while driving the CEL illuminated. Was near an Oreilly’s and stopped in to have the code read. Got the P0420 cat related code. Could that have any correlation with the solenoid replacements or are the two likely unrelated?, My equinox is throwing a code for either the catalytic. exhaust engine is cold. Make sure to include the exhaust manifold when checking for leaks/cracks. If these check ok, then most commonly, the Converter is "on it's way out" and will need replacement in the near future. Keep in mind, you will need a replacement converter that meets specs. , If the light turns off, there’s probably nothing wrong with the StabiliTrak system. If the light remains on, continue with the following steps. Shut down the vehicle. Walk away and do something else for about 15 minutes. This time gives the system a chance to reset. Restart the vehicle., 2. chevyguy8893 Lifetime Premium · #2 · Jul 30, 2010. P0420 is a catalyst efficiency code. 100% of the time you need a new catalytic converter. If you want to be sure it is the cat pull the O2 sensor before the cat and drive it, the sluggishness will go away because there is no more restriction., Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. 1 (855) 347-2779 · [email protected]. GET A QUOTE. Common signs of a faulty VVT solenoid include the Check Engine Light coming on, dirty engine oil, rough engine idle, and decreased fuel economy., Chevrolet Equinox P0016 definition: The correlation of the camshaft and crankshaft positions on bank 1 is incorrect based on the intake camshaft position sensor. Repair Urgency: Fix this code immediately (same day if possible) to avoid internal engine damage. Diagnosis: This trouble code can cause the vehicle to be hard to start and run …, Follow my Builds / Projects: www.youtube.com/c/patrickkasilag?sub_confirmation=1Quick video on how to change bank 1 sensor 1 oxygen sensor on a 2015 chevy eq..., 2014 Chevrolet Equinox. Asked by Visitor in Troy, NY on January 12, 2020. My 2014 Chevrolet Equinox keeps showing P0420 Code My car was brought to dealership for fixing and they charged me 1400.00 for a manifold when I google the code it says catalyst converter and a day after picking up my car the check engine light came back on, did …, I have a 2010 Chevy equinox I trying to repair it has a lot of trouble codes and I understand they can all be related I have mechanical experience can you tell me which codes are the most important in ... P0315,P228D, P0089, P0315, P0335,P0420, just had the motor replaced, ... I have a 2010 equinox, just replaced the engine with a 2011 equinox ..., Apr 30, 2021 · Engine Code CHEVROLET P0420: Catalyst System Efficiency Below Threshold (Bank 1). It indicates that the Catalytic Converter is not functioning efficiently, so the vehicle is increasing the... , The purpose of the downstream oxygen sensor is to monitor the efficiency of the catalytic converter. You can sometimes also experience a P0420 code together with the P0138. RELATED: Bank 1 vs Bank 2 – Sensor 1 & 2 (Locate O2 Sensors Fast & Easy) P0138 Trouble Code Symptoms. In many cases, the car will continue running as normal …, My equinox is throwing a code for either the catalytic. exhaust engine is cold. Make sure to include the exhaust manifold when checking for leaks/cracks. If these check ok, then most commonly, the Converter is "on it's way out" and will need replacement in the near future. Keep in mind, you will need a replacement converter that meets specs. , Symptoms. There are several reasons why your Chevrolet Equinox is reporting the p0420 trouble code. Most of the time, this trouble code means a bad …, Step 1 – Resolve Engine Trouble Codes. The first step is to resolve any other codes that may have come up in addition to the P0420; especially troublesome is the P0300 series of cylinder misfire codes. A P0300 code could be related to something in the ignition (spark plug or coil), the fuel injector, compression or fuel contamination. , LT2 Equinox 2010 . Sent for noisy idle and ping sound at start or driving. Only 1 year left under warranty decide to sent it in. cost me $230.54 for oil change, decarbonizing and fuel injector cleaning. warranty repair was estimate around $3000 . Even it is under warranty , I was scared of the news. Overall the car feels great now with no noise ..., Solenoid valve was listed for 56.14 but with my discount I got it for $45.46 at Chevy dealer. OReilly's had it listed for 49.99 under Dorman 917-216 number but did not have it in stock. Amazon lists Dorman valve for $24.75 on sale. ... '11 LTZ, born Aug 2010, Fairfax, KS V6/A6, Red Jewel Tintcoat / Cocoa-Cashmere, ..., Jun 4, 2018 · P0420 Permanent Code is the ECU saying the "second" O2 sensor (s) after your first catalytic converter (s) are not sending the signals the computer expects in relation to the signals the first O2 sensor (s) located in the exhaust manifold, are sending. 1. , WHAT CAUSES CODE P0420 ENGINE LIGHT CHEVROLET, CHEVY, GMC, BUICK, CADILLAC Great Car Scanner: https://amzn.to/2QmNBri Check out our Amazon Store for the to..., The code P030X (p0301-P0308) means that the cylinder number X misfires, or there is no combustion in that cylinder. For example, if the cylinder number 1 misfires in a 4-cylinder engine, it will run only on 3 cylinders and will have the code P0301, see the animation. Misfiring engine. The code P0300 stands for random misfire., How-to: Fix codes P0010, P0011, P0013 or P0014 on the 2.4L ecotec engine: Remove the engine cover. Find the two small cylinders just to the left of the #1 spark plug. They are called the intake & exhaust camshaft position (CMP) actuator solenoids. I recommend that you replace them both., What Does The P0420 Code Mean? The P0420 code indicates that the Engine Control Module (ECM) has identified a decline in the efficiency of the catalytic converter on Bank 1. This could be …, P0420 is a diagnostic trouble code (DTC) for "Catalyst System Efficiency Below Threshold (Bank 1)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic ..., DTC P0341 stands for “Camshaft Position Sensor “A” Circuit Range/Performance (Bank 1 or Single Sensor)” This code is triggered when the PCM detects problems with the camshaft position sensor signal on Bank 1, and this is typically caused by a faulty CMP, bad circuitry, or a defective camshaft reluctor wheel., Mar 29, 2022 · Multiple codes, diagnosis in different directions, sad ending.