GM P0230? (Professionals recommend)

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.

  • OBD2 Code P0230 GM definition: The fuel pump is activated by a PCM-controlled relay. Just as the name implies, a “relay” permits the transmittal of higher amperage current to the fuel pump without that current having to travel through the PCM (Powertrain Control Module).

What causes a P0230 code?

Error Code P0230 is caused by low voltage in main power circuit of fuel pump relay. A low battery voltage may trigger this code, especially if the voltage is lower than the specified level. The fuel pump may be getting too much power which results to low voltage condition.

What is a fuel pump primary circuit?

OBD-II Code P0230 is defined as a Fuel Pump Primary Circuit. The Fuel Pump enables the transfer of fuel from the fuel tank to the fuel injectors in the engine. The Fuel Pump is controlled by the engine computer (PCM) or the Fuel Pump Control Module (most newer vehicles).

How do I fix code P0230?

What repairs can fix the P0230 code?

  1. Repairing or replacing the fuel pump fuse or fusible link, and replacing the fuel pump.
  2. Replacing the fuel pump relay.
  3. Replacing the fuel pump only.

What are the signs of a bad fuel pump relay?

How to tell if fuel pump relay is bad (6 Signs)

  • Check Engine Light (CEL) Illuminated. In most cases, the primary symptom is a check engine light.
  • High Mileage.
  • Long Starting Time.
  • Engine Performance Issues – Stalling, Idling, Acceleration, Not Starting.
  • Car dies while driving.
  • Silent Fuel Pump Noise.

How do you fix code P0087?

What repairs can fix the P0087 code?

  1. Replacing the fuel filter or screen.
  2. Replacing kinked fuel lines.
  3. Removing and replacing the fuel pump.
  4. Replacing a faulty fuel pressure sensor.

What is fuel pump secondary circuit failure?

Code P0232 is triggered when voltage in the fuel pump secondary circuit is shorted to vehicle power through the relay. The ECM monitors this voltage to see if it stays on after the key is turned off. The most common failure is a relay stuck to the On position internally.

Will a faulty fuel pump throw a code?

If the fuel pump one day just decides to up and quit when you go to start your vehicle in the morning, it most likely will not set a code. However if you have a wiring related failure, the PCM may be able to self diagnose the wiring fault and set a circuit high or circuit low Diagnostic Trouble Code.

How do you test a fuel pump relay with a multimeter?

Check the Coil

  1. Set the multimeter up to read ohms. The ohms scale looks a little like a horseshoe.
  2. Touch the meter leads together to test the multimeter. You should read zero ohms. Touch the test leads across the coil of the relay. You should read about 70 ohms.

What does a fuel pump control module do?

The Fuel Pump Driver Module controls the voltage delivered to a vehicle’s fuel pump. By controlling the voltage, the module maintains optimal fuel pressure and fuel delivery to the engine throughout its full operating range.

Where is fuel pump relay?

Most fuel-pump relay units are located under the dashboard near the steering column. In some cases, the unit is located in the area where the steering column is mounted or near the engine’s firewall.

How do you diagnose a bad fuel pump?

Is My Fuel Pump Going Bad? Here Are 8 Signs It Is!

  1. Fuel Tank Noise. A damaged fuel pump might make a loud, whining sound that you’ll hear from your gas tank.
  2. Difficult Starts.
  3. Sputtering Engine.
  4. The Actual Stall.
  5. Power Loss.
  6. Surging Power.
  7. Lower Fuel Efficiency.
  8. Dead Engine.

How can I start my car with a bad fuel pump?

So, one of the best tips to start a car with a bad fuel pump is to leave your car’s engine cool. When your car cools off, it allows the fuel pump to reset without the need for pressure. Also, it would be best if you neither let your car engine get too cool or get very hot.

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GM P0230

A service bulletin, PIP4462, has been issued by General Motors to fix a GM P0230 Fuel Pump Relay Control Circuit for all 2004 through 2009 General Motors automobiles and light trucks. Using a digital
multimeter, measure the resistance between pins 6 and 14 on the diagnostic link connector (DLC), which is also known as the OBDII port on the vehicle. The resistance should be in the range of 60-10 percent. If everything checks out, go to the fuel pump control module and verify the power and ground connections.

It is no longer necessary to use a pressure regulator in this situation.

Check power and ground at the fuel pump control module

Remove the connection from the control module for the fuel pump. Terminal 1 should be checked for ground, while terminal 32 should be checked for battery voltage. In the event that you have a bi-directional scan tool, instruct the fuel pump to operate and check for voltage at pin 13 of the fuel pump. Control module for the fuel pump Keep an eye out for aftermarket security systems. The presence of an aftermarket anti-theft system should be checked if you discover that the necessary resistance, voltage, and ground have been found.

It is recommended that you replace the gasoline pump control module if the system does not include an aftermarket security system and your voltage and resistance testing are satisfactory.

The year 2020 is a leap year.

Rick Muscoplat posted a blog entry on

Error Code P0230: Fuel Pump Primary Circuit Malfunction

Fuel Pump Primary Circuit Malfunction is defined as the cause of Error Code P0230. If this occurs when the fuel pump primary circuit is ordered On/Off, it shows that there is a problem with the circuit. This code is often set when the PCM detects an erroneous voltage and reports it to the driver. As a general fault code, it applies to all cars equipped with OBD-II, as well as vehicles manufactured between 1996 and the present day. Manufacturer and model specifics on the definition, diagnosis, and repair of a faulty product differ from one another.


This is accomplished using a relay, which is controlled and activated by the PCM (powertrain control module, also known as ECM or engine control module in some manufacturers). Because of this, the ‘relay’ enables for the transmission of greater amperage current to the fuel pump without the need for the current to pass through the PCM as it would otherwise. It goes without saying that it is always preferable not to have greater amperage current near the PCM since it might generate more heat and cause the PCM to fail.

  • The term ‘relay’ refers to a device that has two sides: the control side (coil) and the switch side (electrical contacts).
  • The ground circuit, on the other hand, is triggered when the PCM driver determines that it is necessary.
  • By switching the switch to the closed position, electricity may pass to the fuel pump activation circuit, which activates the pump.
  • The gasoline pump will not be triggered again until the PCM receives a signal indicating that the engine is turning.

Whenever the PCM detects voltage that is outside of the anticipated range, the Error Code P0230 is activated.

Common Symptoms

This error code, like other issue codes, causes the Check Engine light to illuminate, which is the most evident indicator of the problem. Other frequent signs and symptoms are as follows:

  • There is no start condition. Fuel pump that is not working
  • There is no activity of the gasoline pump. When the ignition is turned on, the fuel pump runs continuously.

Possible Causes

Because of a blown fuel pump fuse or fusible link, or because of a shorted fuel pump or circuit, the most typical reason of this code is when the main power to the fuel pump relay is low. Other potential reasons of Error Code P0230 include the following:

  • Control circuit with a short to the battery voltage
  • Control circuit with an open fuel pump control circuit
  • Any of the problems listed above can be caused by chafing on the harness. Defective relay
  • Defective power control module
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How to Check

Similarly to the majority of other issue codes, this one is diagnosed using a scanner, which records the freeze frame data to validate the problem, along with the conditions of the vehicle at the time the fault was detected. The codes are then cleared in order to see if the problem returns. Mechanics should also examine the fuel pump fuse or fusible link to determine if they have blown out completely. Then, if the battery voltage is present, they will check the voltage to the primary circuit of the fuel pump relay.

How to Fix

Treatment for this error code, of course, is dependent on the results of the diagnostic procedure. Some of the more typical fixes, on the other hand, are as follows:

  • Repairing or replacing the fuse or fusible link in the fuel pump
  • Replacement of the fuel pump (and alone the fuel pump relay)
  • Replacement of the fuel pump relay.

Low voltage in the main power circuit of the fuel pump relay is the source of the error code P0230. The PCM checks this voltage to determine if it is lower than the voltage specified by the manufacturer. If it is, the PCM shuts down. It is possible for this code to be triggered by a low battery voltage, especially if the voltage is lower than the set level. It is possible that the fuel pump is receiving excessive power, resulting in a low voltage problem. To determine if the error codes P0231 or P0232 are present, run through the procedure described in the pinpoint test for trouble codes to see if there is a problem on the secondary side of the fuel pump circuit.


P0230Description FUEL PUMP Regulate CIRCUITPCM is responsible for providing ignition voltage to control the gasoline pump. When an electrical problem occurs in the relay control circuit, PCM is capable of detecting it. When the ignition is turned on for the first time, the PCM activates the fuel pump relay, which supplies electricity to the fuel pump. As long as the engine is running or cranking and the PCM is getting reference pulses, the fuel pump relay will stay activated. Upon the absence of any reference pulses, the PCM de-energizes the fuelpump relay within 2 seconds of the ignition being turned on or the engine being stopped.

DTC will be activated if an electrical issue is identified.


  • Disconnect the fuel pump relay from the main power supply. Connect a test light between the fuel pump relay connection cavities for the fuel pump relay control circuit and the relay ground to verify that the circuit is operational. Install the scanning software. Turn the ignition key to the on position when the engine is off. Command the gasoline pump relay to turn on and off using the scan tool. If the testlight lights when the fuel pump is activated, the fuel pump is operational. Verify that the fuel pump relay is operational
  • Inspect the fuel pump relay connector for faulty terminal connections. Check for any damaged or shorted cables.

Electrical Madness – Forums

Electrical Madness is a topic covered in this article. Auntie Vee originally posted this quote on her blog. When the IPCBEC fuse is removed, the draw lowers to 0.25 AMP, which is within specifications. He disconnected all of the connections from the BCM, but the draw remained active. The disconnecting of connections from the Onstar Mod, Radio, RCDLR, IPC, SDM, Rollover sensor, PPS, Fuel Pump mod, and Multifuction switch was done in order to isolate the draw from the vehicle. I couldn’t afford to pay the dealership the amount they asked for additional three hours of labor (about $400).

  1. Radio, RCDLR, IPC, Multifunction switch, SDM, air bags, and FSCM are examples of such devices.
  2. I’d also like to figure out where I can get my hands on some X405 so that I can look for corrosion.
  3. Any suggestions would be much appreciated.
  4. Please accept my apologies for not responding sooner.
  5. However, if you’d want to receive a faster answer to your inquiries or requests for extracts, it’s OK to send them by email.
  6. You mention the X405 connection, but I couldn’t locate any evidence of it being utilized on the 2008 Vue.
  7. Please see post 2 of the following topic for a few tidbits of information on X408.
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I saw that you were also interested in learning more, so I’ve attached screen pictures of the three pages of 08 Vue electrical diagrams – they may not be fully legible, and pdf versions of the diagrams were already provided to post6 of the subsequent thread: You might begin with the first diagram, either by using the screen photos or the pdf.

BEC 40A is the I/P.

Begin at the upper left side of the figure, near the underhood fuse block, and make a note of I/P BEC FUSE 40A.

3.Go to the third diagram and look for the letter K, which is in the center of the page and on the left hand side.

5.I’d anticipate that the BCM would turn on these relays when the key is set to ACC/ON (RUN).

The path to other circuits that use ACC/RAP power, such as interior lights and the radio, is not included on the schematics; but, if you believe it is relevant, I will look into it more for you.

1.Begin with page 1 of 3 – the first line from the red battery cable.

Locate the continuation of circuit A (in the center of the same page) and follow it to the circuit B identification (middle of page one).

4.Take note that the second circuit of identifier B is I/P BEC FUSE 1 60A – this fuse supplies power to identifier M.

(page 2).

6.Those would be the fuses you could remove presuming you had attached an ammeter to the battery ground to check for residual drain before you started the process.

According to what I’ve read, disconnecting this fuse might cause the VCIM to assume that the Vue was involved in an accident, causing the VCIM to drain the internal battery.

Good luck, and please don’t get the impression that I’m attempting to overwhelm you.

I only come to the forum once or twice a month, if at all. Please do not hesitate to contact me via private message if you believe I can assist you. Please do not use a guest message since I do not check such.

GM P0230 – OBD Codes

Fuel Pump Primary Circuit Malfunction NOTE: For natural gas applications, the following description applies to the fuel shutoff valve (FSV) circuit. The PCM monitors the fuel pump (FP) circuit output from the PCM. The test fails if: With the FP output commanded ON (grounded), excessive current draw is detected on the FP circuit; or with the FP output commanded OFF, voltage is not detected on the FP circuit (the PCM expects to detect VPWR voltage coming through the fuel pump relay coil to the FP circuit) (the PCM expects to detect VPWR voltage coming through the fuel pump relay coil to the FP circuit).

Possible causes

  • Fuel pump (FP) circuit is open or shorted
  • The VPWR circuit to the fuel pump relay is open. Fuel pump relay that has been damaged
  • PCM that has been damaged

Diagnostic help

When the FPF PID displays the letter YES, a malfunction is currently occurring. The only way to identify an open circuit or a short to ground is to turn off the gasoline pump and look for it. It is only when the fuel pump is turned on that a short to power may be discovered. It will be necessary to cycle the fuel pump output command ON and OFF during the KOEO and KOER self-tests.

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