AutoCodes – Chevrolet – P00C9 2017 Chevrolet Silverado

P00C9 2017 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 2017 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 250

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 2017 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 2017 Chevrolet Silverado - Fuel Pressure Regulator High Control Circuit Low Voltage - AutoCodes.com — P00C9 2017 Chevrolet Silverado Code - Fuel Pressure Regulator High Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P00C9 2017 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 2017 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 2017 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 2017 Chevrolet Silverado code?

Need more information on how to fix the P00C9 2017 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 2017 Chevrolet Silverado Code

1. What does the OBDII code P00C9 mean for a 2017 Chevrolet Silverado?

The P00C9 code indicates a "Fuel Pressure Regulator High Control Circuit Low Voltage," meaning there's an electrical issue with the fuel pressure regulator circuit.

2. What are the common symptoms of the P00C9 code in a 2017 Chevrolet Silverado?

Symptoms may include difficulty starting, reduced engine performance, poor fuel efficiency, stalling, or an illuminated check engine light.

3. What causes the P00C9 code to appear on a 2017 Chevrolet Silverado?

Common causes include a faulty fuel pressure regulator, damaged wiring or connectors in the circuit, a malfunctioning powertrain control module (PCM), or a weak battery.

4. Can I drive my 2017 Chevrolet Silverado with a P00C9 code?

While it may be possible to drive, it is not recommended as the issue can lead to poor engine performance, reduced fuel efficiency, and potential long-term damage.

5. How do I diagnose the P00C9 code on a 2017 Chevrolet Silverado?

Start by scanning the vehicle with an OBDII scanner, inspecting the fuel pressure regulator and its wiring for damage, and testing the circuit voltage with a multimeter.

6. How do I fix the P00C9 code on a 2017 Chevrolet Silverado?

Repairs may include replacing the fuel pressure regulator, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.

7. Is a faulty fuel pressure regulator the only cause of the P00C9 code?

No, other possible causes include wiring issues, corroded connectors, a weak battery, or a malfunctioning PCM.

8. How much does it cost to fix the P00C9 code on a 2017 Chevrolet Silverado?

Repair costs can vary but may range from $100 to $400 depending on whether the issue is with the fuel pressure regulator, wiring, or PCM.

9. Can a dead or weak battery trigger the P00C9 code?

Yes, a weak or failing battery can cause low voltage in the fuel pressure regulator circuit, leading to this code.

10. How do I prevent the P00C9 code from occurring in my 2017 Chevrolet Silverado?

Regular maintenance, such as inspecting and replacing damaged wiring or connectors, ensuring a healthy battery, and keeping the fuel system clean, can help prevent this code.