AutoCodes – Chevrolet – P00C9 2018 Chevrolet Silverado

P00C9 2018 Chevrolet Silverado Code - Fuel Pressure Regulator High Control Circuit Low Voltage

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: P00C9 2018 Chevrolet Silverado indicates Fuel Pressure Regulator High Control Circuit Low Voltage.
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 605

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 P00C9 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 a short to ground in the high-pressure fuel pump actuator high control circuit.

OBDII Code P00C9 2018 Chevrolet Silverado - Fuel Pressure Regulator High Control Circuit Low Voltage - AutoCodes.com — P00C9 2018 Chevrolet Silverado Code - Fuel Pressure Regulator High Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P00C9 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 P00C9 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 P00C9 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 P00C9 2018 Chevrolet Silverado code?

Need more information on how to fix the P00C9 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 P00C9 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P00C9 in a 2018 Chevrolet Silverado?

The common symptoms of OBDII code P00C9 in a 2018 Chevrolet Silverado include poor engine performance, rough idle, reduced fuel efficiency, and potentially stalling.

2. What does the OBDII code P00C9 indicate in a 2018 Chevrolet Silverado?

The OBDII code P00C9 in a 2018 Chevrolet Silverado indicates a Fuel Pressure Regulator High Control Circuit Low Voltage issue.

3. What are the possible causes of OBDII code P00C9 in a 2018 Chevrolet Silverado?

Possible causes of OBDII code P00C9 in a 2018 Chevrolet Silverado include a faulty fuel pressure regulator, wiring issues in the control circuit, or a problem with the engine control module (ECM).

4. How can I diagnose the OBDII code P00C9 in my 2018 Chevrolet Silverado?

Diagnosing OBDII code P00C9 in a 2018 Chevrolet Silverado involves using an OBDII scanner to retrieve the code, checking the fuel pressure regulator and related wiring for any visible damage, and testing the voltage in the control circuit.

5. How serious is OBDII code P00C9 in a 2018 Chevrolet Silverado?

OBDII code P00C9 in a 2018 Chevrolet Silverado should be addressed promptly to prevent potential engine performance issues and further damage to the vehicle.

6. Can I drive my 2018 Chevrolet Silverado with OBDII code P00C9?

It is not recommended to drive your 2018 Chevrolet Silverado with OBDII code P00C9, as it can lead to poor engine performance and potential stalling, risking further damage to the vehicle.

7. How can I repair OBDII code P00C9 in my 2018 Chevrolet Silverado?

Repairing OBDII code P00C9 in a 2018 Chevrolet Silverado may involve replacing the fuel pressure regulator, repairing any damaged wiring in the control circuit, or addressing any issues with the ECM.

8. Are there any DIY tips for fixing OBDII code P00C9 in a 2018 Chevrolet Silverado?

While diagnosing OBDII code P00C9 may require specialized tools, some DIY tips include checking for loose or damaged wiring connections and ensuring the fuel pressure regulator is functioning properly.

9. How much does it cost to fix OBDII code P00C9 in a 2018 Chevrolet Silverado?

The cost to fix OBDII code P00C9 in a 2018 Chevrolet Silverado can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Can resetting the OBDII code P00C9 in a 2018 Chevrolet Silverado resolve the issue?

While resetting the OBDII code P00C9 may temporarily clear the warning light, it is crucial to address the underlying problem causing the code to prevent further issues with your 2018 Chevrolet Silverado.