what is code p0420 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
The P0420 code indicates that your vehicle s powertrain control module PCM monitors the poor efficiency of the catalytic converter at Bank 1 This code may also be triggered due to a bad catalyst or a false alarm caused by a faulty oxygen sensor at Bank 1 What does error code P0420 mean A P0420 shows the PCM has detected an issue with the catalytic converters As discussed above the catalytic converter converts toxic gas from the combustion chamber into less harmful gases before releasing them into the atmosphere
what is code p0420
what is code p0420
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As the code description implies the P0420 code means that the vehicle s Engine Control Module ECM has detected that the Three way Catalyst Converter is not working properly it is not as efficient as the factory expects The P0420 is one of the most common OBD II trouble codes Any time the Check Engine Light illuminates this code should be highly suspected This article will guide you through how to diagnose your vehicle s MIL Malfunction Indicator Lamp and determine if a P0420 error exists for any given vehicle
The P0420 code is a generic error code used by all manufacturers since 1996 when the OBD II port for vehicle scanners became commonplace So whether your vehicle is a Toyota Nissan 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
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The exact definition of the P0420 code is Catalyst System Efficiency Below Threshold It might sound like a severe problem but the risk of significant trouble is low You ll see this code when your engine control module ECM thinks the catalyst isn t working at maximum efficiency P0420 This is a fault code that indicates a catalyst efficiency that s below the required threshold The catalytic converter is responsible for transforming exhaust gases into harmless substances so you don t want it to be underperforming
A P0420 code indicates a problem with the catalytic converter The purpose of the catalytic converter is to break down harmful pollutants created during the combustion cycle By using fine platinum and gold meshes to filter exhaust fumes the catalytic converter is able to reduce the emissions expelled from the exhaust pipe The P0420 code points to Catalyst System Low Efficiency and signals that oxygen levels are below the desired threshold on bank 1 based on readings from the O2 sensor Although the issue is related to the catalytic converter you might experience symptoms that you wouldn t associate with it at first glance Here are the
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what is code p0420 - The P0420 is one of the most common OBD II trouble codes Any time the Check Engine Light illuminates this code should be highly suspected This article will guide you through how to diagnose your vehicle s MIL Malfunction Indicator Lamp and determine if a P0420 error exists for any given vehicle