AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Buick - P0230 Buick

P0230 Buick Code - Fuel Pump Relay Control Circuit

- Code Popularity: 9,730 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC P0230 Buick?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Fuel Pump Relay
  • Fuel Pump Relay harness is open or shorted
  • Fuel Pump Relay circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)
⚠ Does your Buick have Safety Recalls? → Check here

How to Fix the DTC P0230 Buick?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for P0230 Buick Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0230 Buick code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

The P0230 code will be set when the Powertrain Control Module (PCM) detects the fuel pump control circuit is shorted to ground.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P0230 Buick Description

When you turn the ignition switch to the ON position, the Powertrain Control Module (PCM) activates the in-tank fuel pump. The fuel pump remains on as long as the PCM receives reference pulses from the electronic ignition system. If there are no reference pulses, the PCM turns the fuel pump off after about 2-3 seconds. The PCM controls the fuel pump relay by applying B+ to the control circuit via an internal switch called a driver. The primary function of the driver is to supply a voltage to the fuel pump relay. The driver has a fault line which the PCM monitors. When the PCM commands the fuel pump on, the voltage of the control circuit should be high (near battery voltage). When the PCM commands the control circuit to the fuel pump OFF, the voltage potential of the circuit should be low (near 0 volts). This DTC sets when the PCM detects the fuel pump control circuit is shorted to ground.
OBDII Code P0230 Buick - Fuel Pump Relay Control Circuit - AutoCodes.com
P0230 Buick Code - Fuel Pump Relay Control Circuit

Need More Information on the Code?

Need more information on how to fix the P0230 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0230 Buick code diagnosed by a professional: Find a repair shop in your area

Code P0230 Buick comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P0230 Buick code? Have you replaced any parts?
Any information is appreciated. Thanks