P1421
Secondary Air System Bank 1.
- BMW
- Powertrain
- Manufacturer code
How this code is built
- P
- SystemPowertrain
- 1
- Defined byThe manufacturer
- 4
- AreaAuxiliary emission controls
- 21
- FaultThe specific fault in that area
Guide
Writing the guide for P1421. The first open of a code takes up to a minute.
This code for other makes
- P1421BuickIntake Air Low Pressure Switch Circuit High Voltage
- P1421CadillacIntake Air Low Pressure Switch Circuit High Voltage
- P1421ChevroletIntake Air Low Pressure Switch Circuit High Voltage
- P1421ChryslerIntake Air Low Pressure Switch Circuit High Voltage
- P1421GMIntake Air Low Pressure Switch Circuit High Voltage
- P1421GMCIntake Air Low Pressure Switch Circuit High Voltage
- P1421OldsmobileIntake Air Low Pressure Switch Circuit High Voltage
- P1421OtherCatalyst Damage
- P1421PlymouthIntake Air Low Pressure Switch Circuit High Voltage
- P1421PontiacIntake Air Low Pressure Switch Circuit High Voltage
- P1421SaturnIntake Air Low Pressure Switch Circuit High Voltage
- P1421SubaruExhaust Gas Recirculation Circuit High Input
- P1421VolkswagenSecondary Air Injection Valve Circuit Short To Ground