P0637
Power Steering Control Circuit High
Generic code
Computer Output Circuit
Medium severity
Moderate repair
Free on OBD DashX
Want real-world data on P0637?
See which problems come with P0637, how often it shows up in other vehicles, and how to fix it — step by step.
- Real-world fix data
- How often it happens
- Step-by-step repairs
What P0637 means
- The fault code P0637 indicates that there is a high voltage issue in the power steering control circuit. This can cause the power steering to not function properly or at all.
Possible symptoms
- Difficulty steering or loss of power steering
- Illuminated power steering warning light
- Unusual noises coming from the power steering system
- Stiff, jerky, or erratic steering
- Reduced or inconsistent steering assistance
Possible causes
- Faulty power steering control module
- Corroded or damaged wiring in the power steering control circuit
- Loose or disconnected electrical connections
- Failed power steering pump
- Failed battery or alternator
Related parts
- Power Steering Circuit: Circuit that controls the power steering in the car. Problems lead to hard steering
Possible solutions
- Replace the power steering control module
- Inspect and repair any damaged wiring in the power steering control circuit
- Tighten or reconnect any loose or disconnected electrical connections
- Replace the power steering pump if necessary
- Replace the battery or alternator if necessary
Free on OBD DashX
P0637 on OBD DashX
Real-world causes, how often this code shows up, and the fix — step by step.
Open P0637 No sign-up needed · available in 10 languagesScan your own car
Read and clear fault codes, live data and service resets with the CaRPM app.