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Engine-Codes – Honda – P0971 Honda

P0971 Honda Code - Pressure Control Solenoid 'C' Control Circuit High

Quick Answer

The P0971 diagnostic trouble code for Honda vehicles indicates an issue with the Pressure Control Solenoid 'C' control circuit being too high. Common causes include Faulty Pressure Control Solenoid 'C', Electrical issues such as a short or open circuit in the wiring, Low transmission fluid levels. 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
P0971 Honda indicates Pressure Control Solenoid 'C' Control Circuit High.
Common causes
Common causes include Faulty Pressure Control Solenoid 'C', Electrical issues such as a short or open circuit in the wiring, Low transmission fluid levels.
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 11, 2024
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Code P0971 Honda Description

The P0971 diagnostic trouble code for Honda vehicles indicates an issue with the Pressure Control Solenoid 'C' control circuit being too high. This solenoid is responsible for controlling the hydraulic pressure in the transmission, which is crucial for proper gear shifting and overall transmission performance. When the control circuit is reading a high voltage signal, it means that there is a malfunction in the solenoid or its associated components.

OBDII Code P0971 Honda - Pressure Control Solenoid 'C' Control Circuit High
P0971 Honda Code - Pressure Control Solenoid 'C' Control Circuit High

Common Causes of P0971 Honda

  1. Faulty Pressure Control Solenoid 'C'
  2. Electrical issues such as a short or open circuit in the wiring
  3. Low transmission fluid levels
  4. Faulty ECM (Engine Control Module)
  5. Mechanical damage to the transmission

Symptoms of P0971 Honda

  1. Harsh or delayed shifting between gears
  2. Transmission slipping
  3. Engine stalling when coming to a stop
  4. Reduced fuel efficiency
  5. Illumination of the Check Engine Light

How to Fix P0971 Honda

  1. Begin by conducting a thorough visual inspection of the wiring and connections associated with the Pressure Control Solenoid 'C'. Look for any signs of damage, corrosion, or loose connections.
  2. Test the solenoid using a multimeter to check for proper resistance and continuity. Replace the solenoid if it fails these tests.
  3. Inspect the transmission fluid level and condition. Top up or replace the fluid as needed.
  4. Clear the fault codes from the vehicle's ECM using a diagnostic scanner and road test the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnosis may be required to pinpoint the exact cause of the high voltage signal in the Pressure Control Solenoid 'C' circuit.

Cost to Fix P0971 Honda

The typical repair costs for addressing a P0971 code in a Honda vehicle can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that these are rough estimates, and actual costs can vary based on factors such as the location of the repair shop, the make and model of the vehicle, and the extent of the repairs needed. As always, it's recommended to get a detailed quote from a trusted auto repair shop before proceeding with any repairs.

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Information for Specific Honda Models

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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