What is P0232 fault code? What is the Fuel Pump Secondary Circuit high Voltage fault? How can you fix the fault code P0232? What are the causes and symptoms of the P0232 error code?
What is the P0232 fault code? What does it all mean?
If the powertrain control module, PCM detects high voltage in fuel pump secondary circuit and the fuel pump relay is in the off position, a code P0232 will be set.
The fuel pump relay’s job is to supply the electrical power required to turn on and start the fuel pump. A feedback circuit is attached to some vehicles. This circuit is monitored by the PCM to ensure the proper voltage supply to the fuel pump. The PCM controls battery voltage in the feedback loop when the fuel pump relay switch is turned on. If the PCM detects high voltage in the feedback loop while the relay’s off, a fault code P0232 can be set.
The P0232 fault code can affect vehicles of all makes and models, including those made by Ford, Land Rover or Volkswagen, Jeep, Mazda, Mazda, or Chevrolet.
What causes the P0232 Fault code?
Here are some reasons why P0232 should be set.
- – Defective fuel pump relay
- – Short or open circuit in the feedback circuit
- – Broken cables or loose connectors
- – Blown fuel pump fuse
- – Defective fuse box
- – Faulty or damaged fuel pump
What are the symptoms of the P0232 Fault Code?
You may experience the following symptoms if your vehicle has a P0232 code:
- – Illumination at the check engine lights
- – The engine won’t start or stop running
- Engine misfire
- – Low fuel pressure / insufficient fuel supply
- – Operation and maintenance of the fuel pump.
How to Fix the P0232 Fault Code
There are several repairs that can resolve the P0232 fault code.
- First, ensure that your battery voltage is at least 12.6V with the engine off and 13.5V with the engine running. You can fix any issues by doing this before you move on.
- If the vehicle doesn’t start, check the fuel pump fuse. If the fuse blows, it means there is a short circuit somewhere. It is possible for the fuse to blow once again by simply replacing it.
- – With the fuel pump relay removed, you should measure at least 4 Ω from the pump to ground. If you measure <4 Ω, you should find and repair the short. Continue the test with your fuel pump disconnected. If the short continues, the problem is between the ground circuit and the relay. Repair frayed wires or damage that caused the short.
- – If you get an open circuit of >10 kΩ, the short circuit is in the pump. Measure the resistance between the terminals while the pump is off. If you are measuring less than 4 Ω, replace the pump.
- – Check the fuel pumps relay. For testing purposes, you can use the relays of systems like headlights or wipers. If the relay swapping works, it is likely that the fuel pump relay is at fault. Reset the relays if that fails.
- – Examine the fuel pump’s wiring and connectors. Repair any broken or melted wires and connectors.
- – Replace the fuel pump.
How serious is the P0232 Fault code?
The fuel pump will continue running until the battery runs out if the relay is not turned on. Short circuits can drain the battery, overload the fuel pump, and cause components to fail. The P0232 fault code must be fixed immediately.
