P0636 Power Steering Control Circuit Low

OBD2 Code: P0636

Description: Power Steering Control Circuit Low

Definition: This diagnostic trouble code (DTC) indicates that the power steering control circuit is experiencing a low voltage condition. This can be due to issues such as poor electrical connections, damaged wiring, or a malfunctioning power steering control module.

P0636 – Power Steering Control Circuit Low

Typical Severity: Moderate

Common Causes

P0636 – Power Steering Control Circuit Low

Common causes:

• Faulty power steering control module
• Loose or corroded wiring connections in the power steering system
• Low power steering fluid level
• Issues with the power steering pump
• Electrical issues within the power steering system

 

Common Misdiagnosis

OBD2 Code: P0636

Description: Power Steering Control Circuit Low

Common Misdiagnosis:

• Faulty power steering control module is often misdiagnosed as a wiring issue.
• Replacing the power steering pump without checking the electrical connections and sensors.
• Assuming a mechanical failure in the steering system rather than an electrical fault.

 

Common Diagnostic Steps

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OBD2 Code: P0636

Description: Power Steering Control Circuit Low

Common Diagnostic Steps:

• Check for any additional trouble codes that may be present, as they can provide further insight into the issue.
• Inspect the power steering control circuit wiring and connectors for signs of damage, corrosion, or disconnection.
• Test the voltage at the power steering control module to ensure it is receiving adequate power supply.
• Examine the ground connections related to the power steering system for proper contact and integrity.
• Use a multimeter to check for continuity in the power steering control circuit.
• If equipped, test the operation of the Electronic Power Steering (EPS) motor and sensor inputs using a scan tool.
• Consult vehicle-specific repair manuals or technical service bulletins (TSBs) for known issues related to this code on your vehicle model.
• If all checks are normal, consider replacing the power steering control module if it is determined to be faulty after thorough testing.