Hydraulic Pressure Sensor Circuit High
The P0935 code indicates that the transmission control module (TCM) has detected a voltage signal from the hydraulic pressure sensor that is higher than the expected range. This sensor monitors the hydraulic pressure within the transmission to ensure proper shifting and clutch engagement. A high voltage reading can be caused by a faulty sensor, wiring issues, or internal transmission problems. This condition can lead to harsh shifting, slipping, or transmission damage if not addressed.
01. Most Common Causes
- Faulty hydraulic pressure sensor
- Short to voltage in sensor circuit
- Damaged wiring or connector
- Internal transmission malfunction
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or erratic shifting
- Transmission slipping
- Reduced fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect the hydraulic pressure sensor and its wiring for damage or corrosion.
Step 3: Test the sensor voltage with a multimeter; compare to manufacturer specs.
Step 4: Check for shorts to power or ground in the circuit.
Step 5: If wiring is intact, replace the hydraulic pressure sensor.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause transmission damage and unsafe driving conditions.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a sensor replacement, but may be higher if wiring repairs or transmission work is needed.