P0643 - Sensor Reference Voltage A Circuit High - DTC Chart
P0643 - SENSOR REFERENCE VOLTAGE A CIRCUIT HIGH - DTC CHART
| Description: This DTC sets when the VREF circuit is greater than VREF maximum. | |||
Possible Causes:
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| Diagnostic Aids: This DTC sets 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 . | ||