AutoCodes – Chevrolet – P00C9 2016 Chevrolet Silverado

P00C9 2016 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 2016 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 588

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 2016 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 2016 Chevrolet Silverado - Fuel Pressure Regulator High Control Circuit Low Voltage - AutoCodes.com — P00C9 2016 Chevrolet Silverado Code - Fuel Pressure Regulator High Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P00C9 2016 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 2016 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 2016 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 2016 Chevrolet Silverado code?

Need more information on how to fix the P00C9 2016 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 2016 Chevrolet Silverado Code

1. What does the OBDII code P00C9 mean for a 2016 Chevrolet Silverado?

P00C9 indicates an issue with the fuel pressure regulator's high control circuit, specifically that the voltage is lower than expected.

2. What are the common symptoms of code P00C9 in a 2016 Chevrolet Silverado?

Symptoms may include poor fuel efficiency, difficulty starting, rough idling, engine stalling, or a check engine light.

3. What causes the P00C9 code to appear?

Causes can 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 a bad fuel pump cause the P00C9 code?

While the code directly relates to the fuel pressure regulator circuit, a failing fuel pump can indirectly affect fuel pressure and might contribute to the issue.

5. How can I fix the P00C9 code on my 2016 Chevrolet Silverado?

Inspect and repair any damaged wiring or connectors, replace the fuel pressure regulator if faulty, and ensure the battery and PCM are functioning properly.

6. Is it safe to drive with a P00C9 code?

Driving with this code can lead to engine performance issues and may cause further damage to the fuel system or engine, so itâ€™s best to address it promptly.

7. How do I diagnose the P00C9 code on a 2016 Chevrolet Silverado?

Use an OBDII scanner to confirm the code, visually inspect the wiring and connectors, test the fuel pressure regulator, and measure voltage in the circuit.

8. Can a blown fuse cause the P00C9 code?

Yes, a blown fuse in the fuel pressure regulator circuit can lead to low voltage and trigger this code.

9. Will clearing the P00C9 code with a scanner fix the problem?

Clearing the code will turn off the check engine light temporarily, but the underlying issue must be resolved to prevent the code from returning.

10. How much does it cost to repair the P00C9 code on a 2016 Chevrolet Silverado?

Repair costs vary depending on the root cause but can range from $50 for simple wiring repairs to $300 or more for replacing the fuel pressure regulator.