AutoCodesGMC – P0808 2016 GMC Sierra

P0808 2016 GMC Sierra Code - Clutch Pedal Position Sensor Circuit High Voltage

Quick Answer

The Clutch Pedal Position (CPP) sensor is a three-wire sensor, connected to a 5 V reference circuit, a low reference circuit, and a signal circuit. Common causes include Faulty Clutch Pedal Position (CPP) Sensor, Clutch Pedal Position Sensor harness is open or shorted, Clutch Pedal Position Sensor circuit poor electrical connection. 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
P0808 2016 GMC Sierra indicates Clutch Pedal Position Sensor Circuit High Voltage.
Common causes
Common causes include Faulty Clutch Pedal Position (CPP) Sensor, Clutch Pedal Position Sensor harness is open or shorted, Clutch Pedal Position Sensor circuit poor electrical connection.
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.
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Code Popularity 155
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 02, 2022
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Code P0808 2016 GMC Sierra Description

The Clutch Pedal Position (CPP) sensor is a three-wire sensor, connected to a 5 V reference circuit, a low reference circuit, and a signal circuit. The Engine Control Module (ECM) supplies 5 V to the CPP sensor and also provides a sensor ground path on the low reference circuit. The CPP sensor sends a voltage signal to the ECM on the signal circuit. The voltage on the signal circuit will vary from a voltage near 4 V when the clutch pedal is released, to a voltage near 1 V when the clutch pedal is applied. The Diagnostic Trouble Code (DTC) will be set if the CPP sensor voltage is more than 4.9 V for more than 1 s.
OBDII Code P0808 2016 GMC Sierra - Clutch Pedal Position Sensor Circuit High Voltage - AutoCodes.com
P0808 2016 GMC Sierra Code - Clutch Pedal Position Sensor Circuit High Voltage

What are the Possible Causes of the DTC P0808 2016 GMC Sierra?

  • Faulty Clutch Pedal Position (CPP) Sensor
  • Clutch Pedal Position Sensor harness is open or shorted
  • Clutch Pedal Position Sensor circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P0808 2016 GMC Sierra?

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 P0808 2016 GMC Sierra 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 P0808 2016 GMC Sierra 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.

Frequently Asked Questions about P0808 2016 GMC Sierra Code

What does the OBDII code P0808 mean for a 2016 GMC Sierra?

P0808 indicates a problem with the Clutch Pedal Position Sensor Circuit, specifically a high voltage condition detected by the vehicle’s computer.

What are the common symptoms of code P0808 in a 2016 GMC Sierra?

Symptoms may include difficulty starting the engine, reduced performance, incorrect gear engagement, or the illumination of the check engine light.

What causes the P0808 code to appear in a 2016 GMC Sierra?

Common causes include a faulty clutch pedal position sensor, damaged wiring, poor electrical connections, or issues with the vehicle's PCM.

Can a faulty clutch pedal position sensor cause P0808?

Yes, a malfunctioning clutch pedal position sensor is one of the primary causes of this code.

How do you diagnose the P0808 code in a 2016 GMC Sierra?

Diagnosis involves using an OBDII scanner to confirm the code, inspecting the clutch pedal position sensor, checking the wiring and connectors, and testing the sensor’s voltage output.

Is it safe to drive a 2016 GMC Sierra with code P0808?

While it may still be drivable, the vehicle could experience poor performance or starting issues. Prompt repair is recommended to avoid further damage.

How do you fix a P0808 code on a 2016 GMC Sierra?

Repairs may include replacing the clutch pedal position sensor, repairing or replacing damaged wiring, or addressing PCM-related issues.

What tools are needed to fix the P0808 code?

You’ll need an OBDII scanner, a multimeter for testing electrical circuits, and basic tools for removing and replacing components.

How much does it cost to repair the P0808 code on a 2016 GMC Sierra?

The repair cost depends on the issue but typically ranges from $100 to $300 for parts and labor, with sensor replacement being the most common fix.

Can the P0808 code be cleared without repairing the issue?

Clearing the code without fixing the problem may temporarily turn off the check engine light, but the code will likely return if the underlying issue remains unresolved.

Discuss the causes and fixes for P0808 2016 GMC Sierra OBDII Code

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