Possible Causes
- GOOD TRIP EQUAL TO ZERO
- O2 SENSOR HEATER RELAY
- (F142) FUSED ASD RELAY OUTPUT CIRCUIT
- (K512) O2 HEATER RELAY CONTROL CIRCUIT OPEN
- (K512) O2 HEATER RELAY CONTROL CIRCUIT SHORTED TO GROUND
- O2 HEATER ELEMENT
- (A242) O2 HEATER RELAY OUTPUT CIRCUIT
- PCM