Engine-Codes.com
Engine-Codes – GMC – P0231 GMC

P0231 GMC Code - Fuel Pump Control Circuit Low Voltage

Quick Answer

The P0231 GMC diagnostic trouble code indicates that the fuel pump control circuit is experiencing low voltage. Common causes include Faulty fuel pump relay, Wiring issues such as frayed or damaged wires, Faulty fuel pump control module. 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
P0231 GMC indicates Fuel Pump Control Circuit Low Voltage.
Common causes
Common causes include Faulty fuel pump relay, Wiring issues such as frayed or damaged wires, Faulty fuel pump control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 25, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0231 GMC Description

The P0231 GMC diagnostic trouble code indicates that the fuel pump control circuit is experiencing low voltage. This means that the power supply to the fuel pump is not at the appropriate level, which can lead to issues with fuel delivery to the engine. The fuel pump control circuit is responsible for regulating the fuel pump's operation, ensuring that the correct amount of fuel is sent to the engine for combustion. When this circuit is experiencing low voltage, it can result in poor engine performance, stalling, or even the vehicle failing to start.

OBDII Code P0231 GMC - Fuel Pump Control Circuit Low Voltage
P0231 GMC Code - Fuel Pump Control Circuit Low Voltage

Common Causes of P0231 GMC

  1. Faulty fuel pump relay.
  2. Wiring issues such as frayed or damaged wires.
  3. Faulty fuel pump control module.
  4. Poor electrical connection or corroded terminals.
  5. Defective fuel pump.

Symptoms of P0231 GMC

  1. Engine misfires or hesitation during acceleration.
  2. Reduced fuel efficiency or decreased power.
  3. Engine stalling or difficulty starting.
  4. Illumination of the check engine light.
  5. Rough idling or erratic engine behavior.

How to Fix P0231 GMC

  1. Check the fuel pump relay and replace if necessary.
  2. Inspect the wiring for any damage or corrosion, repairing or replacing as needed.
  3. Test the fuel pump control module and replace if faulty.
  4. Ensure all electrical connections are secure and clean.
  5. Test the fuel pump for proper operation and replace if it is found to be defective.

Cost to Fix P0231 GMC

The cost of repairing a P0231 GMC code can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay between $200 and $500 for parts and labor. Keep in mind that additional diagnostic time may be needed to pinpoint the exact cause of the low voltage issue. It's recommended to get quotes from multiple auto repair shops to find the best price for the repair.

Need more information about the P0231 GMC code?

Need more information on how to fix the P0231 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0231 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

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 P0231 GMC Code

1. What are the common symptoms of OBDII code P0231 in a GMC related to the fuel pump control circuit low voltage?

Symptoms may include difficulty starting the vehicle, hesitation or sputtering during acceleration, and a decrease in overall engine performance.

2. What are the potential causes of OBDII code P0231 indicating a low voltage issue in the fuel pump control circuit of a GMC?

Possible causes include a faulty fuel pump, damaged wiring or connectors in the fuel pump circuit, a blown fuse, or a problem with the fuel pump relay.

3. How can I diagnose the root cause of OBDII code P0231 in my GMC related to the fuel pump control circuit low voltage?

You can start by checking the fuel pump fuse, inspecting the wiring and connectors for any damage, testing the fuel pump relay, and measuring the voltage at the fuel pump to identify the source of the low voltage issue.

4. Is it safe to continue driving my GMC with OBDII code P0231 triggered due to a low voltage problem in the fuel pump control circuit?

It is not recommended to drive the vehicle with this code as it can lead to fuel delivery issues and potential engine damage. It's best to address the issue promptly to avoid further complications.

5. Can a DIY enthusiast repair OBDII code P0231 indicating a low voltage issue in the fuel pump control circuit of a GMC?

Depending on your skill level and access to tools, you may be able to repair this issue yourself by checking and replacing the fuel pump fuse, inspecting and repairing damaged wiring, or replacing the fuel pump relay.

6. How much does it typically cost to repair OBDII code P0231 in a GMC caused by a low voltage issue in the fuel pump control circuit?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $500, including parts and labor.

7. What are some preventive measures to avoid triggering OBDII code P0231 related to low voltage in the fuel pump control circuit of a GMC?

Regularly inspecting the fuel pump circuit, keeping electrical components clean and well-maintained, and addressing any issues promptly can help prevent this code from being triggered.

8. Can a low battery voltage cause OBDII code P0231 to appear in a GMC indicating a low voltage issue in the fuel pump control circuit?

Yes, a low battery voltage can sometimes cause issues with the fuel pump control circuit, leading to the triggering of OBDII code P0231. It's important to ensure the battery is in good condition.

9. Are there any recalls or technical service bulletins (TSBs) related to OBDII code P0231 in GMC vehicles concerning the fuel pump control circuit low voltage?

It's recommended to check with a GMC dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or TSBs related to this specific issue.

10. Will resetting the OBDII system clear the P0231 code caused by a low voltage problem in the fuel pump control circuit of a GMC?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear. It's essential to diagnose and fix the root cause of the problem to prevent further issues.

Discuss the causes and fixes for P0231 GMC OBDII Code

Submit a New Comment

Code P0231 GMC comments

No comments found for this page.