When Monitored and Set Condition
- When Monitored: Once per driving cycle when the Engine is at idle, Air Pump was activated at start-up, Barometric Pressure greater than 78 kPa (11 psi), Engine Coolant Temperature is greater than 50°C (122°F), and no other DTCs.
- Set Condition: When the test is enabled, the O2 Sensor must increase by at least 23% (rich).
| Possible CauseS |
| AIR PUMP RELAY CONTROL CIRCUIT OPEN |
| AIR PUMP RELAY CONTROL CIRCUIT SHORT TO GROUND |
| AIR PUMP RELAY CONTROL CIRCUIT SHORT TO VOLTAGE |
| AIR PUMP RELAY CONTROL CIRCUIT SHORT TO AIR PUMP RELAY OUTPUT CIRCUIT |
| RELAY CONTROL MODULE |
| POWERTRAIN CONTROL MODULE |
For a complete Powertrain Control Module Circuit Diagram, (Refer to ENGINE - SCHEMATICS AND DIAGRAMS) .