AutoCodes – Chevrolet – P00C8 2018 Chevrolet Silverado

P00C8 2018 Chevrolet Silverado Code - Fuel Pressure Regulator High Control Circuit

Quick Answer

High-pressure fuel is regulated by the high-pressure fuel pump actuator, which is a part of the high-pressure fuel pump. Common causes include Faulty High-Pressure Fuel Pump, High-Pressure Fuel Pump harness is open or shorted, High-Pressure Fuel Pump electrical circuit poor 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: P00C8 2018 Chevrolet Silverado indicates Fuel Pressure Regulator High Control Circuit.
Common causes: Common causes include Faulty High-Pressure Fuel Pump, High-Pressure Fuel Pump harness is open or shorted, High-Pressure Fuel Pump electrical circuit poor 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 1,176

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 May 16, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P00C8 2018 Chevrolet Silverado Description

High-pressure fuel is regulated by the high-pressure fuel pump actuator, which is a part of the high-pressure fuel pump. The high-pressure fuel pump actuator is a solenoid valve. The Engine Control Module (ECM) provides battery voltage on the actuator high control circuit and ground on the actuator low control circuit. Both circuits are controlled through output drivers within the ECM. When deactivated, both drivers are disabled. When activated, the high control circuit driver energizes the high-pressure fuel pump actuator, and the low control circuit driver Pulse-Width Modulates (PWM) the low control circuit to the ground. The ECM monitors the voltage on the circuits to detect a failure. The Diagnostic Trouble Code (DTC) will set if the ECM detects an open circuit in the high-pressure fuel pump actuator high control circuit.

OBDII Code P00C8 2018 Chevrolet Silverado - Fuel Pressure Regulator High Control Circuit - AutoCodes.com — P00C8 2018 Chevrolet Silverado Code - Fuel Pressure Regulator High Control Circuit

What does this mean?

What are the Possible Causes of the DTC P00C8 2018 Chevrolet Silverado?

Faulty High-Pressure Fuel Pump
High-Pressure Fuel Pump harness is open or shorted
High-Pressure Fuel Pump electrical circuit poor connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P00C8 2018 Chevrolet Silverado?

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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P00C8 2018 Chevrolet Silverado 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 P00C8 2018 Chevrolet Silverado code?

Need more information on how to fix the P00C8 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P00C8 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P00C8 in a 2018 Chevrolet Silverado?

The common symptoms of code P00C8 include rough idling, decreased fuel efficiency, and potential stalling of the vehicle.

2. What does the OBDII code P00C8 mean for a 2018 Chevrolet Silverado?

OBDII code P00C8 in a 2018 Chevrolet Silverado indicates an issue with the fuel pressure regulator high control circuit.

3. What are the possible causes of OBDII code P00C8 in a 2018 Chevrolet Silverado?

Possible causes of code P00C8 include a faulty fuel pressure regulator, wiring issues in the control circuit, or a malfunctioning fuel pressure sensor.

4. How can I diagnose the OBDII code P00C8 in my 2018 Chevrolet Silverado?

Diagnosing code P00C8 involves using an OBDII scanner to retrieve the code, inspecting the fuel pressure regulator and related components, and checking for any wiring issues.

5. Can I still drive my 2018 Chevrolet Silverado with OBDII code P00C8?

It is not recommended to drive your Silverado with code P00C8 as it can lead to further damage to the fuel system and potentially cause unsafe driving conditions.

6. What are the repair options for OBDII code P00C8 in a 2018 Chevrolet Silverado?

Repair options for code P00C8 include replacing the fuel pressure regulator, repairing any wiring issues, or addressing any sensor malfunctions.

7. How much does it cost to fix OBDII code P00C8 in a 2018 Chevrolet Silverado?

The cost of fixing code P00C8 can vary depending on the exact cause of the issue, but it typically ranges from $200 to $500 for parts and labor.

8. Can a DIY enthusiast fix OBDII code P00C8 in a 2018 Chevrolet Silverado?

While some DIY enthusiasts may be able to address simpler issues related to code P00C8, it is recommended to seek professional help for a more accurate diagnosis and repair.

9. How long does it take to repair OBDII code P00C8 in a 2018 Chevrolet Silverado?

The repair time for code P00C8 can vary based on the extent of the issue and the availability of parts, but it typically takes a few hours to complete the repair.

10. Is it necessary to reset the OBDII code P00C8 after the repair in a 2018 Chevrolet Silverado?

Yes, it is important to reset the OBDII code P00C8 after completing the repair to clear the error code and ensure proper functioning of the vehicle's fuel system.