Possible Causes
| Possible Causes |
|---|
| KNOCK SENSOR 1 SIGNAL CIRCUIT SHORTED TO THE KNOCK SENSOR RETURN CIRCUIT |
| KNOCK SENSOR 1 SIGNAL CIRCUIT SHORTED TO GROUND |
| KNOCK SENSOR 1 |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .