car error code p0420
(DTC) is a generic powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may obd2 code 420 be slightly different depending on the model. So this engine code article
Error Code P0420 Vw Jettaapplies to Nissan, Toyota, Chevrolet, Ford, Honda, GMC, etc. The catalytic converter is a part of the exhaust
Error Code P0420 Honda Civicsystem that looks kind of like a muffler, although it's job is very different from that of a muffler. A catalytic converter's job is to reduce emmissions from the exhaust.
Error Code P0420 Ford F150The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream O2 sensor reading should be fairly steady. Typically the P0420 code triggers the Check Engine Light if the readings of the two sensors are similar. This is error code p0420 nissan maxima indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). Catalytic converters are not normally a "wear" type item, that is they are not deisgned to wear out and need replacement. If they have failed, it is likely due to something else that caused it to fail. Symptoms The main symptom to the driver is the illumination of the MIL (malfunction indicator lamp). You will likely not notice any drivability problems, although there may be symptoms. For example, if the substance inside the catalytic converter is broken or failed, it may be restricting the exhaust which will result in a feeling of reduced power output from the vehicle. Causes A code P0420 may mean that one or more of the following has happened: Leaded fuel was used where unleaded was called for A damaged or failed oxygen sensor (HO2S) Downstream oxygen sensor (HO2S) wiring damaged or connected improperly The engine coolant temperature sensor is not working properly Damaged or leaking exhaust manifold / catalytic converter / muffler / exhaus
partsScheduled maintenanceView your car’s maintenance scheduleCarsCheck cars for recalls, common issues & maintenance costsMoreAbout our mechanicsHand-picked, community-rated professionalsContactReach us by phone or email, or read FAQBecome a mechanic Explore nationwide job opportunities error code p0420 subaru for automotive techniciansReviewsTrusted mechanics, rated by thousands of happy car owners How error code p0420 toyota corolla it works Services Pricing AdviceMoreAdvice Articles & Questions Ask a Mechanic Scheduled maintenance Estimates Parts Cars More About error code p0420 honda accord our mechanics Become a mechanic Reviews Contact Get a quoteNeed help?Call us: (800) 701-6230Need help?Call us: (800) 701-6230Get a quote Search Home Articles P0420 OBD-II Trouble Code: Catalyst System Efficiency https://www.obd-codes.com/p0420 Below Threshold (Bank 1) P0420 OBD-II Trouble Code: Catalyst System Efficiency Below Threshold (Bank 1) by Jamahl Walker on April 06, 2016 ShareTweetPin P0420 code definition Catalyst System Efficiency Below Threshold (Bank 1) What the P0420 code means The catalytic converter pulls in the pollutants that are expelled by the cylinders and uses oxygen to break up these harmful https://www.yourmechanic.com/article/p0420-obd-ii-trouble-code-catalyst-system-efficiency-below-threshold-bank-1-by-jamahl-walker pollutants. Therefore, the catalytic converter is able to reduce the emissions expelled from the exhaust pipe. This is the purpose of the catalytic converter. The catalytic converter has two oxygen sensors. One oxygen sensor is positioned in front of the catalytic converter and the other oxygen sensor is positioned in the rear. The upstream oxygen sensor is located in front of the catalytic converter. If the upstream oxygen sensor is working properly, its readings should fluctuate when the car is warm and when in closed loop. The downstream oxygen sensor is located behind the catalytic converter. If the downstream oxygen sensor is working properly, its readings should remain steady. When the oxygen sensors have a reading that is similar to each other, it is an indication that the catalytic converter is not working as efficiently as it is intended. If the voltage of the downstream oxygen sensor decreases, and begins to fluctuate like the upstream oxygen sensor, it means that the oxygen levels are too high and the Power Control Module will then store the P
Certifications Federal Warranty CARB Warranty Return Policy Safety Statement Catalogs Federal (EPA) Applications CARB Applications Request Printed Catalogs Education Tech Tips Video Training Literature http://www.easterncatalytic.com/education/tech-tips/the-misleading-nature-of-the-po42o-code/ Distributors/Ordering Online Ordering for Distributors Find a Distributor News Contact Contact Eastern Free Catalytic Converter Newsletter Sign-up Request a quote for Diesel Employment Opportunities Products Products Overview Eco Series Direct-Fit Universal Manifold Carb High Performance Diesel OE Products Flex Pipes Components About About Overview Industry associations Our History Mission Statement Our Locations Our Certifications Federal Warranty CARB error code Warranty Return Policy Safety Statement Catalogs Education Literature Video Training Tech Tips Our Distributors News Contact Location Information Converter Quarterly Sign-up Free Catalytic Converter Request for Quote - Diesel The Misleading Nature of the PO42O Code By Ken Schafer Jr. © Reproduced with permission from Undercar Digest. For subscription information call 800-274-7890 or visit www.mdpublications.com. Upon error code p0420 the arrival of the Onboard Diagnostics II (OBD-II) system, I remember thinking to myself that this new system was going to be the greatest thing to happen to vehicles since I had started working on them. Now all I needed to do was plug in a scan tool, since all vehicles would have the same data-link connector (DLC) much to my delight again, and the car would tell me what was wrong with it. Sadly, it was only a few weeks later that I learned that this new system was still only a guideline and not a complete diagnosis. Throughout the years, after the start of OBD-II, it has become more and more accurate, but it still requires a bit of investigating after retrieval of the diagnostic trouble codes (DTCs). The P0420 code is no different. Here is a scenario: A customer pulls into the shop and says, “My check-engine light is on.” I tell them that I will scan the vehicle and find out what the proble