DTC P0418 Cadillac
Secondary Air Pump Relay Control Circuit Malfunction
Secondary Air Pump Relay Control Circuit Malfunction
Description
Engine started; system voltage over 10.0v and the PCM detected an unexpected voltage on the AIR Solenoid Relay control circuit.
Cause and Solution
AIR relay control circuit is open, shorted to ground or power
AIR relay control circuit is shorted to system power (B+)
AIR relay power circuit is open (test power from main relay)
AIR relay is damaged or has failed
Video Guide
Diagnostic Info
- DTC Code: P0418
- Brand: Cadillac