Possible Causes
WARNING: This page is about a different car, the 2014 Fiat 500c and 2014 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| KNOCK SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE |
| KNOCK SENSOR SIGNAL CIRCUIT OPEN |
| KNOCK SENSOR RETURN CIRCUIT OPEN |
| KNOCK SENSOR SIGNAL CIRCUIT SHORTED TO THE KNOCK SENSOR RETURN CIRCUIT |
| KNOCK SENSOR SIGNAL CIRCUIT SHORTED TO GROUND |
| KNOCK SENSOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .