P0936: Hydraulic Pressure Sensor Circuit Intermittent — what it means, the affected system and what to check before replacing parts.
Meaning, symptoms, causes and checks
Hydraulic-pressure sensor: The response is intermittent or unstable; a normal reading at another moment does not exclude the recorded condition. An electrical sensor reading is not automatically an actual hydraulic pressure measurement. Confirm the sensing circuit before assuming pump failure or real pressure loss.
Affected system: Transmission hydraulic sensing and pressure unit
Symptoms
- Warning light may illuminate
- Related system function may be impaired
- Vehicle-specific symptoms vary
Possible causes
- Implausible sensor or switch signal, poor ground, connector corrosion, or wiring damage
- Related wiring, connector, power or ground fault
- Vehicle-specific mechanical or control issue
What to check
- Record stored and pending codes and freeze-frame data
- Compare the named sensor or switch signal with actual operating conditions; inspect the connector, reference supply, ground and harness.
- Confirm measured values against the vehicle service information
- Retest under the conditions that set the code
- Compare the named sensor or switch signal with actual operating conditions; inspect the connector, reference supply, ground and harness.
- Repair the verified cause and confirm the code does not return
Also written as: P0936-00, P093600, PO936 (some scan tools add the fault-type byte, e.g. -00).