P1421

Set by the manufacturer, so it means different things on different makes. 11 makes in the table below.

More codes than this one? Paste your whole scan

What P1421 means, by make 11 makes

Audi Secondary air-N112 short to ground 45A5 17829
BMW Secondary Air System Bank 2
Chevrolet Intake Air Low Pressure Switch Circuit High Voltage
Citroen Catalyst Damage
Fiat Catalytic converter 1 temperature
Ford Catalyst Damage
Peugeot Catalyst Damage
Subaru EVAP Purge Control Valve Circuit High Input
Toyota Evaporative Emission Canister Gross Leak
Volkswagen Secondary air-N112 short to ground 45A5 17829
Volvo Sec. Air Inj. Valve Circ Short to Ground

Each line is that manufacturer's own meaning for P1421. They are genuinely different faults, not rewordings of one, so a meaning listed against one make says nothing about the others. If your make is not listed, we do not hold it - your manufacturer's service information is the authority.

Code structure P1421

Powertrain

engine, transmission and emissions

Manufacturer-specific

Defined by the vehicle manufacturer, so the meaning varies between makes.

Fault index

identifies the specific fault

Powertrain Manufacturer-specific

Nearby codes in the P1 range

Manufacturer code meanings from kierandrewett/obd (b56a07a), used under the MIT licence. Copyright (c) Kieran Drewett. SpareRadar is not affiliated with the dataset's authors.