What does error code p0421 mean on catalytic converter?
Error Code P0421 is described as Warm Up Catalyst Efficiency Below Threshold (Bank 1). This means the Catalytic Converter’s Oxygen Sensor Downstream has detected that the Bank 1 converter is not working properly.
When is the p0421 Mitsubishi engine code detected?
Most auto repairs shops charge between $75 and $150 per hour. When is the P0421 MITSUBISHI code detected? The P0421 code is set when PCM has determined that the warm up catalyst efficiency for bank 1 is below threshold for the current engine operating condition.
What does p0421 mean in Powertrain Control Module?
The P0421 code means that the powertrain control module is noticing that the catalyst system is not performing as it should during warm up conditions.
What should I do if my p0421 is reset?
If the P0421 is immediately reset, start the engine and allow it to reach normal operating temperature, then allow it to idle (with the transmission in neutral or park). Use the scanner data stream to observe O2 sensor input data. Narrowing the data stream to include only pertinent data will yield faster data response.
What can do to fix code p0421?
- Replacing the catalytic converter
- Replacing the oxygen sensor
- Repairing or replacing wiring that is associated with the oxygen sensor
- Replacing the powertrain control module
What does the service code P0420 mean?
P0420 is a trouble code that gets stored in your car engine’s control unit when it recognizes a problem with the catalytic converter’s efficiency . There are many different reasons for this, so you need to know how to diagnose this trouble code properly.
What does a computer code P0420 mean?
P0420 code is associated with catalytic converters. Catalytic converters break down the harmful pollutants generated during the combustion cycle. The converter is fitted with gold and platinum mesh to filter the exhaust fumes.
What does engine code p0421 mean?
What the P0421 code means. The P0421 code means that the powertrain control module is noticing that the catalyst system is not performing as it should during warm up conditions.