P0947
PowertrainTransmission Pressurehigh severityHydraulic Pump Relay Circuit Low
What P0947 Means
The voltage in the hydraulic pump relay circuit is lower than expected. This often indicates a short to ground or excessive resistance in the circuit.
Symptoms
- Transmission slipping
- Transmission warning light on
- Delayed gear engagement
Common Causes
- Short to ground in relay wiring
- Faulty pump relay
- Corroded connector
- Faulty PCM/TCM
Diagnostic Steps
- Inspect relay circuit for shorts to ground
- Measure circuit voltage with scan tool
- Test relay coil resistance
- Verify PCM output signal
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