AutoCodesCadillac – P0808 Cadillac

P0808 Cadillac 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 Cadillac 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 355
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 Cadillac 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 Cadillac - Clutch Pedal Position Sensor Circuit High Voltage - AutoCodes.com
P0808 Cadillac Code - Clutch Pedal Position Sensor Circuit High Voltage

What are the Possible Causes of the DTC P0808 Cadillac?

  • 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 Cadillac?

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 Cadillac 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.

Frequently Asked Questions about P0808 Cadillac Code

1. What does the OBDII code P0808 mean on a Cadillac?

The P0808 code indicates a high voltage issue in the clutch pedal position sensor circuit, which monitors the position of the clutch pedal.

2. What are the common symptoms of the P0808 code on a Cadillac?

Symptoms may include difficulty starting the vehicle, inability to shift gears smoothly, reduced engine performance, or the check engine light turning on.

3. What causes the P0808 code on a Cadillac?

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

4. How do I diagnose the P0808 code on my Cadillac?

Start by visually inspecting the clutch pedal position sensor and its wiring for damage or loose connections. Use a multimeter to check voltage levels and test the sensor's functionality.

5. Can I drive my Cadillac with the P0808 code active?

It's not recommended to drive with this code, as it can affect gear shifting and vehicle performance, potentially leading to unsafe driving conditions.

6. How do I fix the P0808 code on a Cadillac?

Repairs may include replacing the clutch pedal position sensor, repairing damaged wiring or connectors, and clearing the code with an OBDII scanner.

7. Is the P0808 code specific to manual transmission Cadillacs?

Yes, this code is generally specific to vehicles with manual transmissions, as it relates to the clutch pedal position sensor.

8. How much does it cost to fix the P0808 code on a Cadillac?

Repair costs vary but typically range from $100 to $300, depending on whether the clutch pedal position sensor or wiring needs replacement.

9. Can a bad clutch pedal position sensor damage other components?

A faulty sensor can cause poor engine performance and transmission issues, but it typically won’t directly damage other components.

10. How can I prevent the P0808 code from reoccurring on my Cadillac?

Regularly inspect the clutch pedal position sensor and its wiring for wear or damage, and address any issues promptly to prevent future problems.

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