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 inside 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 shifts, slipping, or transmission damage if not addressed.
1. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or erratic shifting
- Transmission slipping
- Reduced fuel economy
2. Most Common Causes
- Faulty hydraulic pressure sensor
- Short to voltage in sensor circuit
- Damaged wiring or connector
- Internal transmission malfunction
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm code P0935 and check for related codes.
Step 2: Inspect the hydraulic pressure sensor wiring and connector for damage, corrosion, or shorts.
Step 3: Test the sensor voltage and resistance with a multimeter; compare to manufacturer specs.
Step 4: If sensor and wiring are okay, perform a transmission pressure test to rule out internal issues.
4. 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 $150 to $400, including parts and labor, depending on the cause and vehicle.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.