Possible Causes
| POSSIBLE CAUSES |
|---|
| (K21) IAT SIGNAL CIRCUIT SHORTED TO VOLTAGE |
| (K21) IAT SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE |
| (K915) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE |
| INTAKE AIR TEMPERATURE (IAT) SENSOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .