| Description | This DTC sets when the VREF circuit is greater than VREF maximum. | ||
|---|---|---|---|
| Possible Causes | VREF circuit short to voltage Damaged sensor Incorrect harness connection | ||
| Diagnostic Aids | This DTC is set due to an over voltage condition on the VREF circuit. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST C: REFERENCE VOLTAGE (VREF) . | ||
P0643 - SENSOR REFERENCE VOLTAGE A CIRCUIT HIGH