AutoCodesGMC – P00CA 2016 GMC Sierra

P00CA 2016 GMC Sierra Code - Fuel Pressure Regulator High Control Circuit High 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
P00CA 2016 GMC Sierra indicates Fuel Pressure Regulator High Control Circuit High 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 334
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 16, 2022
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Code P00CA 2016 GMC Sierra 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 voltage in the high-pressure fuel pump actuator high control circuit.
OBDII Code P00CA 2016 GMC Sierra - Fuel Pressure Regulator High Control Circuit High Voltage - AutoCodes.com
P00CA 2016 GMC Sierra Code - Fuel Pressure Regulator High Control Circuit High Voltage

What are the Possible Causes of the DTC P00CA 2016 GMC Sierra?

  • 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 P00CA 2016 GMC Sierra?

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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P00CA 2016 GMC Sierra 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 P00CA 2016 GMC Sierra code?

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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 P00CA 2016 GMC Sierra Code

1. What does the OBDII code P00CA mean on a 2016 GMC Sierra?

P00CA indicates an issue with the fuel pressure regulator high control circuit, specifically that it is experiencing high voltage.

2. What are the common symptoms of code P00CA on a 2016 GMC Sierra?

Symptoms may include rough idling, poor acceleration, reduced fuel efficiency, difficulty starting, and the check engine light being illuminated.

3. What causes the P00CA code to appear in a 2016 GMC Sierra?

Common causes include a faulty fuel pressure regulator, wiring issues (such as a short circuit or damaged harness), a malfunctioning powertrain control module (PCM), or corroded electrical connections.

4. Can I drive my 2016 GMC Sierra with a P00CA code?

While the vehicle may still be drivable, continued operation with this code can lead to performance issues and potential engine damage. It’s best to address the problem promptly.

5. How do I diagnose the P00CA code on a 2016 GMC Sierra?

Start by using a scan tool to confirm the code, inspect the fuel pressure regulator and wiring for damage, and test the voltage and resistance in the control circuit.

6. How do I fix the P00CA code on my 2016 GMC Sierra?

Repairs may include replacing the fuel pressure regulator, repairing or replacing damaged wiring, cleaning or securing electrical connections, or reprogramming/repairing the PCM.

7. How much does it cost to repair the P00CA code on a 2016 GMC Sierra?

The repair cost can vary depending on the issue but typically ranges from $150 to $500, including parts and labor.

8. Can a faulty fuel pressure sensor trigger the P00CA code?

Yes, a malfunctioning fuel pressure sensor can contribute to this code by providing incorrect readings to the PCM.

9. Will resetting the check engine light fix the P00CA code?

Clearing the code without addressing the underlying issue will only result in the code returning. Proper diagnosis and repair are required.

10. What tools are needed to troubleshoot the P00CA code on a 2016 GMC Sierra?

You’ll need an OBDII scanner, a multimeter for electrical testing, and potentially a wiring diagram for the fuel pressure regulator circuit.

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