AutoCodesGMC – P0807 2018 GMC Sierra

P0807 2018 GMC Sierra Code - Clutch Pedal Position Sensor Circuit Low 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
P0807 2018 GMC Sierra indicates Clutch Pedal Position Sensor Circuit Low 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 169
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 P0807 2018 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 less than 0.1 V for more than 1 s.
OBDII Code P0807 2018 GMC Sierra - Clutch Pedal Position Sensor Circuit Low Voltage - AutoCodes.com
P0807 2018 GMC Sierra Code - Clutch Pedal Position Sensor Circuit Low Voltage

What are the Possible Causes of the DTC P0807 2018 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 P0807 2018 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 P0807 2018 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 P0807 2018 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 P0807 2018 GMC Sierra Code

What does OBDII code P0807 mean for a 2018 GMC Sierra?

Code P0807 indicates that the clutch pedal position sensor circuit is experiencing low voltage, which may affect the vehicle's ability to accurately detect the clutch pedal's position.

What are the common symptoms of code P0807 in a 2018 GMC Sierra?

Symptoms include difficulty starting the engine, erratic clutch operation, reduced performance of cruise control, and illumination of the check engine light.

What causes code P0807 in a 2018 GMC Sierra?

Common causes include a faulty clutch pedal position sensor, damaged wiring or connectors in the sensor circuit, or issues with the vehicle's powertrain control module (PCM).

Can code P0807 affect engine performance in a 2018 GMC Sierra?

While the code primarily impacts clutch-related functions, it can indirectly affect engine performance by interfering with systems like cruise control or causing starting issues.

How can I diagnose code P0807 in my 2018 GMC Sierra?

Use an OBDII scanner to confirm the code, inspect the clutch pedal position sensor for damage, check wiring and connectors for corrosion or breaks, and test voltage at the sensor circuit.

Can code P0807 prevent a 2018 GMC Sierra from starting?

Yes, if the clutch pedal position sensor fails to detect the clutch pedal being pressed, the vehicle may not start as a safety measure.

How do I fix code P0807 on my 2018 GMC Sierra?

Repair options include replacing the clutch pedal position sensor, fixing damaged wiring or connectors, and resetting the PCM after repairs.

Is it safe to drive a 2018 GMC Sierra with code P0807?

Driving may be possible, but clutch-related functions like starting or cruise control may be compromised, and prolonged issues could lead to further damage.

How much does it cost to repair code P0807 on a 2018 GMC Sierra?

The cost varies depending on the specific issue but may range from $100 to $300 for sensor replacement and wiring repairs.

Can a malfunctioning PCM cause code P0807 in a 2018 GMC Sierra?

Yes, a faulty PCM can misinterpret sensor signals, leading to low voltage errors like P0807. However, this is less common than sensor or wiring issues.

Discuss the causes and fixes for P0807 2018 GMC Sierra OBDII Code

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