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P0231 is a diagnostic trouble code (DTC) for "Fuel Pump Secondary Circuit Low". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $50.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
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Fuel Pump Primary Circuit Malfunction
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
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
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
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
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
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
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.
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