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Engine-Codes – GMC – P0806 2018 GMC Sierra

P0806 2018 GMC Sierra Code - Clutch Pedal Position Sensor Performance

Quick Answer

The P0806 diagnostic trouble code (DTC) indicates a performance issue with the Clutch Pedal Position Sensor (CPPS) in a 2018 GMC Sierra. Common causes include A faulty Clutch Pedal Position Sensor that is not providing accurate readings to the ECM, Damaged or corroded wiring or connectors associated with the CPPS, Misalignment of the clutch pedal, which may prevent the sensor from functioning correctly. 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
P0806 2018 GMC Sierra indicates Clutch Pedal Position Sensor Performance.
Common causes
Common causes include A faulty Clutch Pedal Position Sensor that is not providing accurate readings to the ECM, Damaged or corroded wiring or connectors associated with the CPPS, Misalignment of the clutch pedal, which may prevent the sensor from functioning correctly.
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 Oct 02, 2024
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Code P0806 2018 GMC Sierra Description

The P0806 diagnostic trouble code (DTC) indicates a performance issue with the Clutch Pedal Position Sensor (CPPS) in a 2018 GMC Sierra. This sensor is crucial for the proper functioning of the vehicle's transmission system, particularly in manual transmission vehicles, as it monitors the position of the clutch pedal. The CPPS sends signals to the Engine Control Module (ECM) to inform it whether the clutch is engaged or disengaged.

OBDII Code P0806 2018 GMC Sierra - Clutch Pedal Position Sensor Performance
P0806 2018 GMC Sierra Code - Clutch Pedal Position Sensor Performance

Common Causes of P0806 2018 GMC Sierra

  1. A faulty Clutch Pedal Position Sensor that is not providing accurate readings to the ECM.
  2. Damaged or corroded wiring or connectors associated with the CPPS.
  3. Misalignment of the clutch pedal, which may prevent the sensor from functioning correctly.
  4. Issues with the clutch assembly itself, such as wear or damage that affects pedal position.
  5. Software issues within the ECM that may require reprogramming or updating.

Symptoms of P0806 2018 GMC Sierra

  1. Difficulty shifting gears, especially when trying to engage or disengage the clutch.
  2. Unusual noises from the transmission when attempting to shift.
  3. The vehicle may stall unexpectedly when the clutch pedal is pressed.
  4. Warning lights illuminated on the dashboard, including the check engine light.
  5. Inconsistent engagement of the clutch, leading to a jerky or rough driving experience.

How to Fix P0806 2018 GMC Sierra

  1. Diagnostic Testing: Begin by using an OBD-II scanner to confirm the P0806 code and check for any additional codes that may provide more context.
  2. Visual Inspection: Inspect the wiring and connectors associated with the CPPS for signs of damage, corrosion, or loose connections.
  3. Sensor Testing: Test the CPPS using a multimeter to ensure it is providing the correct voltage and resistance readings according to manufacturer specifications.
  4. Replace Faulty Components: If the CPPS is determined to be faulty, replace it with a new sensor. If wiring issues are found, repair or replace the damaged sections.
  5. Clear Codes and Test Drive: After repairs, clear the DTCs and perform a test drive to ensure the issue has been resolved and that the vehicle operates normally.

Cost to Fix P0806 2018 GMC Sierra

The cost to repair a P0806 code can vary widely based on the specific issue identified during diagnosis. On average, the cost for parts and labor can range from $150 to $600. A new Clutch Pedal Position Sensor typically costs between $50 and $200, while labor rates can vary from $80 to $150 per hour, depending on the shop's location and reputation. In metropolitan areas or at dealerships, rates may be higher, while independent shops may offer lower rates. It's advisable to check local rates and obtain multiple quotes for a more precise estimate. Additionally, diagnostic time can vary, so be prepared for potential additional costs if further investigation is required.

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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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