AutoCodes – GMC – P00CA 2018 GMC Sierra

P00CA 2018 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 2018 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 397

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P00CA 2018 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 2018 GMC Sierra - Fuel Pressure Regulator High Control Circuit High Voltage - AutoCodes.com — P00CA 2018 GMC Sierra Code - Fuel Pressure Regulator High Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P00CA 2018 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 2018 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.

What does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P00CA 2018 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 2018 GMC Sierra code?

Need more information on how to fix the P00CA 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P00CA 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 2018 GMC Sierra Code

1. What are common symptoms of OBDII code P00CA in a 2018 GMC Sierra related to the Fuel Pressure Regulator High Control Circuit High Voltage?

- Common symptoms may include rough idling, engine misfires, decreased fuel efficiency, and potentially stalling.

2. What are some possible causes of the Fuel Pressure Regulator High Control Circuit High Voltage code (P00CA) in a 2018 GMC Sierra?

- Causes can include a faulty fuel pressure regulator, issues with the fuel pump, wiring or connector problems, or a malfunctioning engine control module (ECM).

3. How can I diagnose the cause of OBDII code P00CA in my 2018 GMC Sierra?

- To diagnose this code, you may need to perform a thorough inspection of the fuel pressure regulator, check the fuel pressure levels, test the fuel pump, and inspect the wiring and connectors for any damage.

4. Can a DIY enthusiast repair the Fuel Pressure Regulator High Control Circuit High Voltage code (P00CA) in a 2018 GMC Sierra?

- While some simple checks like inspecting for loose connections can be done by DIY enthusiasts, diagnosing and repairing complex issues related to the fuel system and ECM may require professional expertise.

5. Is it safe to continue driving my 2018 GMC Sierra with OBDII code P00CA related to the Fuel Pressure Regulator High Control Circuit High Voltage?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to potential engine damage or unsafe driving conditions.

6. How much does it typically cost to repair OBDII code P00CA in a 2018 GMC Sierra?

- The cost of repairs can vary depending on the exact cause of the issue, but it may involve replacing the fuel pressure regulator, repairing wiring, or addressing other related components. Costs can range from a few hundred to over a thousand dollars.

7. Can a faulty fuel pressure sensor trigger the P00CA code in a 2018 GMC Sierra?

- Yes, a faulty fuel pressure sensor can contribute to issues with fuel pressure regulation, potentially leading to the triggering of the P00CA code.

8. Will resetting the OBDII system clear the P00CA code in a 2018 GMC Sierra?

- Resetting the system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear after driving the vehicle for some time.

9. Are there any safety precautions to take when dealing with the Fuel Pressure Regulator High Control Circuit High Voltage code in a 2018 GMC Sierra?

- Ensure the engine is off and cool before inspecting or working on the fuel system components. Take precautions to prevent fuel leaks or spills and follow proper safety procedures when handling fuel.

10. How can regular maintenance help prevent the occurrence of OBDII code P00CA in a 2018 GMC Sierra?

- Regular maintenance, such as timely fuel system inspections, fuel filter replacements, and using high-quality fuel, can help prevent issues that may lead to the triggering of the P00CA code.