P0418

Test 1 - 2:

Test 3 - 6:

SYMPTOM
P0418-AIR PUMP RELAY CIRCUIT

WHEN MONITORED
With the ignition on. Battery voltage greater than 10.4 volts.

SET CONDITION
An open or shorted condition is detected in the Air Pump Relay Control circuit. One Trip Fault.

POSSIBLE CAUSES
- Air pump relay operation
- Air pump relay ground
- Air pump relay
- Air pump relay control circuit open
- Air pump relay control circuit short to ground
- PCM