P0421 mitsubishi express
WebP0421: Warm Up Catalyst Efficiency Below Threshold What Does It Mean? Your vehicle is equipped with at least one oxygen sensor , and if your vehicle is newer than 1995, multiple … WebJan 9, 2011 · P0421: Warm Up Catalyst Efficiency Below Threshold (Bank 1). This could apear because of a bad O2 sensor on the catalytic converter on bank 1. Or The catalytic converter is no longer functioning properly. Hope this helps you. Good luck bro Posted on Jan 09, 2011 Helpful 3 Not Helpful Comment Flag
P0421 mitsubishi express
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WebOct 19, 2011 · how to fix p0421 code? Answered in 6 minutes by: Mitsubishi Mechanic: SuperDave SuperDave, ASE Certified Technician Category: Mitsubishi Satisfied Customers: 1,491 Experience: over 16 years experience Verified SuperDave : the most likely cause to your problem is Catalytic converter deteriorated Heated oxygen sensor failed ECM failed … WebJul 3, 2012 · P0421 MITSUBISHI - Warm Up Catalyst Efficiency Below Threshold- Cylinders 1-4 Possible causes- Warm Up Three Way Catalytic converter deterioration or malfunction - Exhaust system leaks - Loose front or rear HO2Ss - Faulty front heater O2 sensor - O2 sensors harness is open or shorted - O2 sensors poor electrical connection
WebThe codes are indicating a material breakdown of the catalytic converter on the firewall side (P0421) or radiator side (P0431) of the engine..... Doug C : What is happening is the air fuel readings are being taken in front of and behind each pre-cat, and the readings are not dis-similar enough to indicate that the catalysts are working properly. WebThe P0431 indicates that the Powertrain Control Module (PCM) has reported an efficiency level below the standard set by the vehicle's manufacturer relating to the engine's warm up catalyst. In some cases, this may be a symptom of a general failure in the catalytic converter. The PCM monitors the intake of oxygen into the catalytic converter.
WebMar 3, 2012 · Hi there, My 2001 Mitsubishi Mirage 1.8, 2 door Coupe, recently had a P0421 code and two weeks later, it now has a P0401 Code. Is the P0421 and P0401 code related in the sense that if the catalalytic … read more Oct 19, 2011 ·
WebAug 24, 2024 · The most common causes for this code are a faulty or worn catalytic converter, a faulty heated o2 rear sensor, an exhaust leak before the upstream sensor, or …
Web1 Answer. I have the same vehicle, same code P0421, changed the BOTH O2 sensors and the check engine light was still on, took it to my fathers garage and checked the Catalytic Converter, and it was ok later I found out that P0421 means that the vehicle doesn't have the proper mixture of gas and air (running richer) so I changed the MAX air flow ... curbow bassWebApr 20, 2024 · P0421 is a generic OBDII trouble code. It has the same meaning for the Mitsubishi Lancer as it would any other vehicle. It is closely related to P0420 (which is the most popular OBD code). Warm Up Catalyst Efficiency → Below Threshold (Bank 1) easy dobosh torteWebThe P0421 code is set when the Engine Control Module (ECM) detects rear HO2S value difference becomes closer to value of front HO2S. The ECM monitors when vehicle … easy dobby costumeWebOct 21, 2010 · AFFECTED VEHICLES 2002-2005 Lancer models equipped with 2.0L engine (approximately 195,000 vehicles) . CUSTOMER NOTIFICATION. A letter will be sent to all owners of affected vehicles, telling them to bring their vehicle to a Mitsubishi Motors dealer to have the PCM reprogrammed at no charge, and that if their vehicle has a SES lamp on … curbow bass acousticWebThe P0421 code relates to the catalytic converter in your vehicle’s exhaust system. It sets when the Powertrain Control Module (PCM) notices that the system is not operating as it … curbow 5WebJul 17, 2024 · EXPERT. P0421 is a converter that is below efficiency on a cold start. I would first verify that the O2 sensor downstream is functioning correctly, It could be sluggish or failing and reading that the converter is the bad part. If the sensor is reading good then it is likely a bad converter. That car can have a single unit mounted under the car ... curbo wheel stopsWebOct 26, 2010 · A code P0421 may mean that one or more of the following has happened: The catalytic converter is no longer functioning properly An oxygen sensor is not reading … easy document scanner software