Possible Causes
| POSSIBLE CAUSES |
|---|
| IAT SIGNAL CIRCUIT SHORTED TO VOLTAGE |
| IAT SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE |
| SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE |
| MASS AIR FLOW SENSOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .