P0420 OBD Trouble Code
1 result found
| 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. |
Try also: https://www.obd-codes.com/p0420
