Possible Causes
| Possible Causes |
|---|
| HUMIDITY SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE |
| 5-VOLT SUPPLY 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 .