Easy step by step instructions on how to replace an automotive fuel pump P0230,
P0231, P0232 and P0233, though appearances will vary the process is the same on
Difficulty Scale: 5 of 10
Tools and Supplies Needed
Fuel siphon hose
Fuel containers large enough to hold the amount of gas in the tank.
Fuel pump replacement
Protective eye wear and clothing
Fuel line removal tool
Fuel tank support
Begin with the vehicle safety raised in the air enough to access the fuel tank.
Use jack stands for additional safety. (No smoking or open flame.)
Step 1 - Disconnect the negative battery terminal, this will avoid sparks
while working with a flammable liquid. (Note: Record pre-set radio stations so they
can be re-entered when the job is complete.)
After completing these steps, reverse the order to reinstall the tank back into
the vehicle. It's best if a
filter is installed at the time of the new fuel pump assembly. Add gas to the
fuel tank before turning the ignition key, this will lubricate the pump.
Some manufacturers provide an access door to service the fuel pump, be sure to
research this information before beginning. To test for a fuel pump failure a
pressure test must be performed. Sometimes the the drive shaft must be removed
along with the fuel tank.
The automotive engine is designed to operate on a specific fuel system pressure
which is vital to engine performance.
To maintain a constant pressure, the fuel
pump is located in the fuel tank and is comprised of an electric motor coupled
to a small internal vein style pump. Fuel pumps have a pressure relief valve that
allows fuel to bypass while recalculating inside the fuel tank. Direct injection
fuel pumps utilize an internal pressure regulator, while having only one liquid
fuel line routed to the engine as opposed to two, (pressure and return lines.)
When the ignition key is turned the fuel pump relay engages while supplying electrical
power to the pump. This relay is controlled by the main
computer which must
detect engine rotation before signaling the relay. When servicing a truck fuel pump
there is the option to remove the bed to access the assembly.
Replace the fuel filter
when replacing the pump, debris can be dislodged and enter the fuel filter during
a pump failure.
Have a fire extinguisher available.
Inspect fuel pump electrical connector for burns or heated spots and replace
if damaged. A
burned connector can cause the pump to intermittently fail.
The fuel pump is controlled by a relay, this
relay should be tested to ensure proper operation.
Do not remove tank unless empty or close to empty, a full gas tank is heavy
and can cause injury.