Power Steering Control Circuit Malfunction
The P0635 code indicates a fault in the power steering control circuit, which may be caused by a malfunctioning power steering control module, wiring issues, or a faulty steering angle sensor. This can result in loss of power steering assist, making the vehicle difficult to steer, especially at low speeds.
01. Most Common Causes
- Faulty power steering control module
- Damaged wiring or connectors in the power steering circuit
- Malfunctioning steering angle sensor
- Blown fuse or relay for power steering system
02. Symptoms You Will Notice
- Loss of power steering assist
- Steering wheel feels heavy or stiff
- Warning light on dashboard (e.g., EPS light)
- Intermittent power steering operation
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and check freeze frame data.
Step 2: Inspect power steering control module wiring and connectors for damage or corrosion.
Step 3: Test power steering control module power and ground circuits.
Step 4: Check steering angle sensor signal and calibration.
Step 5: If all else fails, replace the power steering control module.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. Loss of power steering can make the vehicle difficult to control, especially at low speeds or during parking maneuvers. Have the vehicle inspected immediately.
How much does it cost to fix?▼
The cost typically ranges from $150 to $400, depending on the root cause. Replacing the power steering control module can be on the higher end, while wiring repairs are less expensive.