P0934
PowertrainTransmission Pressurehigh severityHydraulic Pressure Sensor Circuit Low
What P0934 Means
The PCM detected a low voltage condition in the transmission hydraulic pressure sensor circuit. This can lead to improper pressure regulation and shifting problems.
Symptoms
- Slipping transmission
- Harsh or erratic shifts
- Transmission warning light
Common Causes
- Short to ground in sensor circuit
- Faulty hydraulic pressure sensor
- Damaged wiring or connector
- PCM/TCM circuit fault
Diagnostic Steps
- Scan for codes and freeze frame data
- Check sensor circuit for short to ground
- Inspect wiring and connector condition
- Test sensor voltage and replace if faulty
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Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
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Serious DIY~$100
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✓ Autel official store
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