AutoCodes – Buick – P0808 Buick

P0808 Buick 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 Positionâ€‰(CPP) Sensor, Clutch Pedal Positionâ€‰Sensor harness is open or shorted, Clutch Pedal Positionâ€‰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 Buick indicates Clutch Pedal Position Sensor Circuit High Voltage.
Common causes: Common causes include Faulty Clutch Pedal Positionâ€‰(CPP) Sensor, Clutch Pedal Positionâ€‰Sensor harness is open or shorted, Clutch Pedal Positionâ€‰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 325

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 02, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0808 Buick 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 Buick - Clutch Pedal Position Sensor Circuit High Voltage - AutoCodes.com — P0808 Buick Code - Clutch Pedal Position Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0808 Buick?

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

How to Fix the DTC P0808 Buick?

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 Buick 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.

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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.