Skip the auto shop - Our mechanics make house calls

P0230 OBD-II Trouble Code: Fuel Pump Primary Circuit Malfunction

Check Engine Light

P0230 code definition

Fuel Pump Primary Circuit Malfunction

What the P0230 code means

P0230 is a generic OBD-II code which indicates that the fuel pump primary circuit has a malfunction of the vehicle power to the fuel pump when it is commanded on or off

What causes the P0230 code?

  • The engine control module (ECM) detects the primary fuel pump circuit voltage as below specifications from the fuel pump relay to the ECM

  • The fuel pump relay main power supply could be low from a blown fuel pump fuse or fusible link, or from a shorted fuel pump or circuit

What are the symptoms of the P0230 code?

  • The Check Engine Light will be illuminated

  • The fuel pump may become inoperative if the fuel pump and relay is bad

  • The engine may not start from a lack of fuel pump operation

How does a mechanic diagnose the P0230 code?

  • Scans codes and documents the freeze frame data in order to verify the problem

  • Clears the DTC codes to verify whether the concern comes back

  • Checks the fuel pump fuse or fusible link to see if it is blown

  • Tests voltage to the fuel pump relay primary circuit to be battery voltage

  • Tests fuel pump relay primary circuit resistance for an open circuit

Common mistakes when diagnosing the P0230 code

Follow these simple guidelines to prevent misdiagnosis:

  • Verify that the battery voltage is within specifications and connections are good

  • Check the electrical connections at the fuel pump relay for overheating from a fuel pump drawing too much power and overheating the circuit

How serious is the P0230 code?

  • The fuel pump primary circuit powers the fuel pump relay and can cause a no start

  • A low battery voltage can trigger the code if the voltage falls below a specified level

  • The fuel pump may be drawing too much power and cause the low voltage condition

What repairs can fix the P0230 code?

Additional comments for consideration regarding the P0230 code

Code P0230 is triggered by low voltage in the main power circuit of the fuel pump relay. The ECM monitors this voltage to see if it falls below a specified voltage.

If codes P0231 or P0232 are present, then follow the pinpoint tests for these codes first to narrow down the failure on the secondary side of the fuel pump circuit.

Need help with a P0230 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...


Related questions

Q: The check engine light often comes on and goes off after a well.

When the Check Engine Light comes on, that means that Trouble Codes, likely identifying the causes of the issue you are having, have been stored in your car's computer. The fastest way to resolve this is to have a Check...

Q: Misfires, Rough idle, Engine Check light, and Engine not starting

Hello there, many different faults can cause your 2002 Chevrolet S10 to have starting issues, misfires and lack of power. The first step would be to scan the truck to determine what codes are present, this will determine what route...

Q: Failed emissions codes P0134, P0327, P3fff

The P0134 code means that the air fuel ratio sensor is not operating. Most of the time it will need replacing to correct. The P0327 code means that your knock sensor is not getting enough voltage. The P03FF may indicate...