What does code P2258 mean?

Q: What does code P2258 mean?

Secondary Air Injection System Control 'A' Circuit High. P2258 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the secondary air injection (AIR) system's 'A' control solenoid or valve. The PCM commands the AIR system on during cold starts to reduce emissions, and it monitors the control circuit for expected voltage changes; a high voltage reading means the circuit is likely shorted to power or the driver inside the PCM is not pulling the circuit low as commanded.

DTC codes / P22xx · Fuel and air metering (injector circuits) / P2258

P2258Secondary Air Injection System Control 'A' Circuit High

P2258 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the secondary air injection (AIR) system's 'A' control solenoid or valve. The PCM commands the AIR system on during cold starts to reduce emissions, and it monitors the control circuit for expected voltage changes; a high voltage reading means the circuit is likely shorted to power or the driver inside the PCM is not pulling the circuit low as commanded.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

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