P0420 OBD Trouble Code

5 results found

P0420 - Generic
Type Powertrain - Auxiliary Emission Controls - ISO/SAE Controlled
Description

Catalyst System Efficiency Below Threshold

Location Bank 1
P0420 - Chrysler
Type Powertrain - Auxiliary Emission Controls - ISO/SAE Controlled
Description

Catalyst Efficiency Below Normal Conditions

Location Bank 1
Cause

Engine running in closed loop for 3 minutes, ECT sensor input over 147°F, engine speed from 1200-1700 rpm with throttle open, VSS over 20 mph, MAP sensor at 1.5-2.0v, then the PCM detected that the switch rate of the rear HO2S-12 reached 70% of the front HO2S-11 switch rate.

P0420 - Ford
Type Powertrain - Auxiliary Emission Controls - ISO/SAE Controlled
Description

Catalyst System Efficiency Below Threshold Conditions

Cause

Engine running at steady state highway conditions for 5 minutes in closed loop, then the PCM detected that the rear HO2S switch rate was too high

P0420 - GM
Type Powertrain - Auxiliary Emission Controls - ISO/SAE Controlled
Description

Catalyst System Low Efficiency Conditions

Location Bank 1
Cause

No PCM codes set, ECT input over 167°F, IAT input over O°F, MAF input 12-32 g/sec, engine speed below 4000 rpm, engine load under 63% and steady for 4 minutes, then engine speed at 1000-3000 rpm and VSS at 30-75 mph and the PCM detected that the catalyst O2 storage capacity was below an acceptable level

P0420 - Nissan
Type Powertrain - Auxiliary Emission Controls - ISO/SAE Controlled
Description

Catalytic converter - Bank 1 - efficiency below limit

Cause

Catalytic converter, wiring, intake/exhaust system, injector, ECM

Try also: http://www.obd-codes.com/p0420