Possible Causes
WARNING: This page is about a different car, the 2009 Jeep Patriot and 2009 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| OBSTRUCTION OR LEAK IN THE SECONDARY AIR SYSTEM |
| (A929) FUSED B+ CIRCUIT OPEN OR HIGH RESISTANCE |
| (Z932) GROUND CIRCUIT OPEN OR HIGH RESISTANCE |
| (K157) MAF SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE |
| (K157) MAF SENSOR SIGNAL CIRCUIT SHORT TO GROUND |
| (K157) MAF SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE |
| (K957) MAF SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE |
| SECONDARY AIR CHECK VALVE |
| SECONDARY AIR PUMP ASSEMBLY |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .