Code Error P0420
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(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 be slightly different depending on the model. So this engine code article applies to Nissan,
P0430 Error Code
Toyota, Chevrolet, Ford, Honda, GMC, etc. The catalytic converter is a part of the p0420 error code subaru exhaust system that looks kind of like a muffler, although it's job is very different from that of a muffler. A catalytic converter's
P0420 Error Code Honda
job is to reduce emmissions from the exhaust. The 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 p0420 error code toyota 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 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 p0420 error code vw 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 / exhaust pipe Retarded spark timing The oxygen sensors in front and behind the converter are reporting too similar of readings Leaking fuel injector or high fuel pressure Cylinder misfire Oil contamination Possible Solutions Some suggested steps for troubleshooting a P0420 error code include: Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required. Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converte
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P0420 Error Code Nissan
Request a quote for Diesel Employment Opportunities Products Products Overview Eco Series Direct-Fit Universal p0420 catalyst system efficiency below threshold bank 1 Manifold Carb High Performance Diesel OE Products Flex Pipes Components About About Overview Industry associations Our History Mission Statement Our Locations Our
P0420 Error Code Jeep
Certifications Federal Warranty CARB 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 https://www.obd-codes.com/p0420 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 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 http://www.easterncatalytic.com/education/tech-tips/the-misleading-nature-of-the-po42o-code/ 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 problem is. Once I hook the scan tool up and navigate through the setup menus and click on display codes, I see P0420. Then I click the display code data and the scan tool says “Converter efficiency below threshold.” I crane my head out of the driver’s seat and yell to the manager that the vehicle needs a converter. This may not be true, as further diagnosis is necessary. From here on, I will try to explain some of the more-general steps I would take when diagnosing a converter with a scan tool. I will stay away from any finer
Fix How Its Done Catalyst Efficiency Below Threshold ACE AUTOS UK SubscribeSubscribedUnsubscribe211211 Loading... Loading... Working... Add to Want to watch this again later? Sign in to add this video to a playlist. https://www.youtube.com/watch?v=-c8090n1Ihs Sign in Share More Report Need to report the video? Sign in to report inappropriate content. Sign in Transcript Statistics 213,926 views 150 Like this video? Sign in to make http://repairpal.com/obd-ii-code-p0420 your opinion count. Sign in 151 177 Don't like this video? Sign in to make your opinion count. Sign in 178 Loading... Loading... Transcript The interactive transcript could not be error code loaded. Loading... Loading... Rating is available when the video has been rented. This feature is not available right now. Please try again later. Published on Jun 20, 2014Here is a tutorial on P0420 code fix catalyst efficiency below threshold How To Diagnose a p0420 code. p0420 Code Fix how to diagnose and fix a Catalytic Converter and what to look out p0420 error code for http://youtu.be/-c8090n1Ihsfirst make sure no other DCT codes are present once all the other DTCs are fixed, clear the codes and start the engine up. Warm the engine up until the engine fan kicks in. Then, increase engine speed for about five minutes, usually between 2,500 rpm; this will help the catalytic converter light off heat up. After this look at the wave forms between the catalytic converter front upstream oxygen sensor and catalytic converter downstream rear O2 sensors. If the front catalytic converter upstream oxygen sensor wave form is switching from high to low (rich to lean) and the rear catalytic converter downstream oxygen sensor is close to a straight line, the original converter should be good. If the rear catalytic converter downstream oxygen sensor O2 sensor is mimicking the front one, the converter most likely took damage and may need to be replaced. A drive cycle will need to be completed and the converter monitor ready before you know whether the converter is good or bad. Category Autos & Vehicles License Standard YouTube License Source videos View attr
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