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P1667 GMC Code - Reverse Inhibit Solenoid Control Circuit

Quick Answer

The P1667 GMC code refers to an issue with the Reverse Inhibit Solenoid Control Circuit in the vehicle. Common causes include Faulty reverse inhibit solenoid, Damaged wiring or connectors in the control circuit, Issues with the PCM. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1667 GMC indicates Reverse Inhibit Solenoid Control Circuit.
Common causes
Common causes include Faulty reverse inhibit solenoid, Damaged wiring or connectors in the control circuit, Issues with the PCM.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1667 GMC Description

The P1667 GMC code refers to an issue with the Reverse Inhibit Solenoid Control Circuit in the vehicle. This solenoid is responsible for controlling the transmission and preventing the vehicle from engaging reverse gear when it is not safe to do so. When this circuit malfunctions, it can lead to various issues with the transmission system, affecting the overall performance of the vehicle.

OBDII Code P1667 GMC - Reverse Inhibit Solenoid Control Circuit
P1667 GMC Code - Reverse Inhibit Solenoid Control Circuit

Common Causes of P1667 GMC

  1. Faulty reverse inhibit solenoid
  2. Damaged wiring or connectors in the control circuit
  3. Issues with the PCM
  4. Low transmission fluid levels
  5. Electrical problems such as a blown fuse

Symptoms of P1667 GMC

  1. Difficulty shifting into reverse gear
  2. Delayed engagement when trying to shift into reverse
  3. Transmission slipping or jerking in reverse
  4. Inability to shift into reverse at all

How to Fix P1667 GMC

  1. Conduct a thorough inspection of the wiring and connectors in the reverse inhibit solenoid control circuit.
  2. Test the solenoid to determine if it is functioning properly. Replace if necessary.
  3. Check the transmission fluid levels and top up if low. Inspect for any leaks.
  4. Scan the PCM for error codes and reset if needed. If the PCM is faulty, it may need to be replaced.
  5. Clear the error code from the system and test the vehicle to ensure the issue has been resolved.

Cost to Fix P1667 GMC

The cost of repairing a P1667 GMC code can vary depending on the specific cause of the issue. On average, you can expect to pay anywhere from $150 to $500 for parts and labor. Keep in mind that labor rates at auto repair shops can vary, so it's best to check with your local mechanic for a more accurate estimate. Additionally, the cost may be higher if the PCM needs to be replaced.

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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.

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