P0699
PowertrainPcm Referencehigh severitySensor Reference Voltage C Circuit High
What P0699 Means
The sensor reference voltage circuit C is reading above the expected 5 volts. This often points to a short to voltage in the reference circuit.
Symptoms
- Check engine light on
- Multiple sensor codes
- Erratic sensor readings
Common Causes
- Short to power in reference wire
- Faulty sensor
- Corroded connector
- Faulty PCM
Diagnostic Steps
- Verify high reference voltage with meter
- Check wiring for short to voltage
- Disconnect sensors to isolate fault
- Repair wiring or replace PCM
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