• Illuminated check engine light
• Increased steering effort
• Intermittent or complete loss of power steering assist
• Faulty power steering control module
• Damaged or corroded wiring or connectors in the power steering circuit
• Short to voltage in the power steering control circuit
ECM: Engine Control Module
Voltage: An electrical force that makes electricity move through a wire
• P0636
• P0638
Power Steering Control Circuit High
This code means that the computer in your car has detected a problem with the power steering system's electrical circuit. It's like if a light switch in your house is stuck in the 'on' position and won't turn off.
The P0637 code indicates that the power steering control circuit is experiencing a higher than expected voltage level.
The power steering system in a vehicle uses an electric motor to assist the driver in steering the vehicle. The control circuit for this motor is monitored by the vehicle's Engine Control Module (ECM). If the ECM detects a voltage level in the power steering control circuit that is higher than the specified range, it triggers the P0637 code.
• Check for any other related trouble codes.
• Inspect the wiring and connectors for damage or corrosion.
• Test the power steering control module for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the power steering control module if faulty.
• Clear the trouble codes and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain the power steering system.
• Ensure all electrical connections are clean and secure.
• Avoid overloading the electrical system.
Electrical Issue
• Do not ignore the check engine light.
• Seek professional diagnostic assistance if unsure.
• Regularly service your vehicle to prevent such issues.
Check with your vehicle manufacturer for specific warranty coverage related to the power steering system.
The P0637 code has been reported in various vehicles with electric power steering systems, often due to electrical issues in the control circuit.
Moderate – While the vehicle may still be drivable, the steering may become difficult, especially at low speeds.
Driving with impaired steering can be dangerous. Address this issue promptly to ensure vehicle safety.
• Vehicle at operating temperature
• Steering wheel turned to full lock position
The power steering control module is typically located near the steering column or integrated into the steering rack assembly.
Q: Can I drive with a P0637 code?
A: It's possible to drive, but it may be difficult to steer, especially at low speeds. It's best to address the issue promptly.
Q: Will a P0637 code cause my car to fail emissions tests?
A: This code is not directly related to emissions, but an illuminated check engine light can cause a vehicle to fail an emissions test.
