AutoCodes – Chevrolet – P00C9 Chevrolet

P00C9 Chevrolet 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 Chevrolet 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 4,029

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

What does this mean?

What are the Possible Causes of the DTC P00C9 Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

Need more information on how to fix the P00C9 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P00C9 Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P00C9 2014 Chevrolet Silverado — Fuel Pressure Regulator High Control Circuit Low Voltage
P00C9 2015 Chevrolet Silverado — Fuel Pressure Regulator High Control Circuit Low Voltage
P00C9 2016 Chevrolet Silverado — Fuel Pressure Regulator High Control Circuit Low Voltage
P00C9 2017 Chevrolet Silverado — Fuel Pressure Regulator High Control Circuit Low Voltage
P00C9 2018 Chevrolet Silverado — Fuel Pressure Regulator High Control Circuit Low Voltage

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 Chevrolet Code

1. What are the common symptoms of OBDII code P00C9 in a Chevrolet related to the Fuel Pressure Regulator High Control Circuit Low Voltage?

The common symptoms include rough idling, decreased fuel efficiency, engine stalling, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code P00C9 in a Chevrolet?

The code P00C9 in a Chevrolet is commonly caused by a faulty fuel pressure regulator, a malfunctioning fuel pump, wiring issues, or a problem with the engine control module (ECM).

3. How can I diagnose the OBDII code P00C9 in my Chevrolet?

To diagnose the code P00C9, you can use an OBDII scanner to retrieve the trouble codes, inspect the fuel pressure regulator and related components for any visible damage, and perform a voltage test on the fuel pressure regulator circuit.

4. Can I still drive my Chevrolet with the OBDII code P00C9 present?

It is not recommended to drive your Chevrolet with the OBDII code P00C9 present, as it can lead to further engine damage and decreased performance. It's best to have the issue diagnosed and repaired as soon as possible.

5. How can I repair the OBDII code P00C9 in my Chevrolet?

Repairing the OBDII code P00C9 in a Chevrolet involves replacing the faulty fuel pressure regulator, repairing any damaged wiring or connectors, or addressing any issues with the fuel pump or ECM.

6. Will resetting the trouble codes make the OBDII code P00C9 go away permanently?

Resetting the trouble codes may temporarily clear the OBDII code P00C9, but if the underlying issue is not fixed, the code is likely to reappear. It's crucial to diagnose and repair the root cause of the problem to prevent the code from returning.

7. How much does it typically cost to repair the OBDII code P00C9 in a Chevrolet?

The cost of repairing the OBDII code P00C9 in a Chevrolet can vary depending on the specific cause of the issue, the labor rates in your area, and the cost of parts. It's recommended to obtain quotes from different mechanics or repair shops for an accurate estimate.

8. Can a DIY enthusiast fix the OBDII code P00C9 in a Chevrolet?

Depending on your level of automotive knowledge and experience, you may be able to address the OBDII code P00C9 yourself by following repair guides, watching tutorials, and using the necessary tools. However, if you are unsure, it's best to seek professional help.

9. Are there any preventive measures to avoid the OBDII code P00C9 in a Chevrolet?

Regular maintenance, such as checking and replacing the fuel pressure regulator at recommended intervals, inspecting the fuel system components, and using high-quality fuel, can help prevent the occurrence of the OBDII code P00C9 in a Chevrolet.

10. How long does it take to repair the OBDII code P00C9 in a Chevrolet?

The repair time for the OBDII code P00C9 in a Chevrolet can vary depending on the specific cause of the issue, the availability of parts, and the expertise of the mechanic. In general, it may take a few hours to a day to diagnose and repair the problem.