P1421 / VW

Secondary Air Injection Valve Circuit Short To Ground

Notes:

P1421 / SUBARU

Exhaust Gas Recirculation Circuit High Input

Notes:

P1421 / FIAT

Catalytic converter 1 temperature

Notes:

P1421 / CHEVROLET

Intake Air Low Pressure Switch Circuit High Voltage

Notes:

P1421 / CADILLAC

Intake Air Low Pressure Switch Circuit High Voltage

Notes:

P1421 / BUICK

Intake Air Low Pressure Switch Circuit High Voltage

Notes:

P1421 / BMW

Secondary Air System Bank 1

Notes:

P1421 / AUDI

Sec.Air Inj.Valve Circ Short to Ground

Notes: