AutoCodes – Generic – P0637

P0637 Code - Power Steering Control Circuit High

Quick Answer

The Engine Control Module (ECM) monitors the Power Steering Control Circuit. Common causes include Faulty Power Steering Control, Power Steering Control harness is open or shorted, Power Steering Control circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P0637 indicates Power Steering Control Circuit High.
Common causes: Common causes include Faulty Power Steering Control, Power Steering Control harness is open or shorted, Power Steering Control circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 7,093

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 01, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0637 Description

The Engine Control Module (ECM) monitors the Power Steering Control Circuit. The ECM sets the OBDII code when the Power Steering Control Circuit is not factory specifications.

OBDII Code P0637 - Power Steering Control Circuit High - AutoCodes.com — P0637 Code - Power Steering Control Circuit High

What does this mean?

What are the Possible Causes of the DTC P0637?

Faulty Power Steering Control
Power Steering Control harness is open or shorted
Power Steering Control circuit poor electrical connection

How to Fix the DTC P0637?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0637 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0637 code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.