What is the P0233 fault number? What is Fuel Pump Secondary Circuit Intermittent Failure? How do you fix the P0233 fault code What are the causes and symptoms of the P0233 error code?
What is the P0233 fault code? What does it signify?
If the powertrain control module PCM detects an intermittent voltage signal in the secondary circuit to fuel pump, with the fuel pump relay at the on position, a code P0233 will be set.
The purpose of the fuel pumps relay is to provide electricity to start or turn off the fuel pumps. 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. The PCM will trigger a P0233 code if it detects an intermittent voltage signal within the feedback circuit while the relay is switched on or off.
The P0233 fault code can affect vehicles of various makes and models, including Ford, Mercedes Benz (Petrol), Peugeot, Nissan, Skoda Toyota, Dodge Chrysler Jeep, Mazda, Mazda, and Chevrolet.
What is the P0233 Fault Code?
Here are some reasons why P0233 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
- – A damaged or defective fuel pump
What are the symptoms for P0232 fault code?
These symptoms may be present if you own a vehicle that has the P0232 code.
- – Illumination for check engine light
- – The engine won’t start, or stop running
- Engine misfire
- – Low fuel pressure / insufficient fuel supply
- – Operation and maintenance of the fuel pump.
- – Even though the ignition is turned on, the fuel pump might not start.
How to Fix the P0233 Fault Code
There are several repairs that can resolve the P0233 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. The fuse could blow again if you simply replace it without correcting the short-circuit problem.
- – 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, it’s likely that the short is between ground circuit and 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. Take the pump off and measure the resistance between its terminals. If you are measuring less than 4 Ω, replace the pump.
- – Check the fuel pump relay. For testing purposes, you can use the relays of systems like headlights or wipers. If the relays are working, it is likely that the fuel pump relay is at fault. Reset the relays if that fails.
- – Examine the fuel pump wiring and connectors. Connectors and wires that are melted or broken should be repaired.
- – Change the fuel pump.
How serious is the P0233 Fault code?
The secondary circuit of the fuel pump powers the fuel pump. This can cause the engine to stop or stall suddenly. The fuel pump will continue running until the battery is dead if the relay is on. Short circuits can drain the battery and cause overloading of the fuel pump. This can also lead to malfunctioning components. It is important to repair the P0233 fault code as soon as possible.
