What does code P1422 mean?

Q: What does code P1422 mean?

Secondary Air Injection Valve Circuit Short To B+. P1422 on Volkswagen vehicles means the engine control module (ECM) has detected a short to battery voltage on the secondary air injection (SAI) valve control circuit. The ECM commands the SAI valve on during cold starts to reduce emissions, but the circuit voltage stays high even when the valve should be off, indicating a wiring fault or a failed valve.

DTC codes / Volkswagen codes / P1422

P1422 · VolkswagenSecondary Air Injection Valve Circuit Short To B+

P1422 on Volkswagen vehicles means the engine control module (ECM) has detected a short to battery voltage on the secondary air injection (SAI) valve control circuit. The ECM commands the SAI valve on during cold starts to reduce emissions, but the circuit voltage stays high even when the valve should be off, indicating a wiring fault or a failed valve.

SystemPowertrain

Code typeVolkswagen specific

SeverityMedium

Fix difficultyIntermediate

AreaAuxiliary emission controls

Guidance is general and written for Volkswagen vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.