Why does my fuel pump have a p0231 code?
Potential causes of a P0231 code include: Bad FP (fuel pump) relay. Harness chafing causing open in fuel pump supply circuit. Loose/damaged connectors. Open in feedback circuit. Fuel pump fuse blown due to short to ground.
What causes an OBD code for a GMC fuel pump?
Causes. Possible causes of OBD code P0230 GM. Potential causes of a P0230 GM code include: Short to ground on control circuit Fuel pump control circuit open Short to battery voltage on control circuit Harness chafing causing one of above conditions Bad relay Bad PCM.
What are the symptoms of a p0231 DTC?
Symptoms of a P0231 DTC may include: Potential causes of a P0231 code include: Harness chafing causing open in fuel pump supply circuit NOTE: If no drivability complaints are present and P0231 code is stored, suspect open in feedback circuit between splice and PCM
What causes low voltage fuel pump secondary circuit?
The ECM monitors the fuel pump relay secondary circuit for voltage. If voltage drops below a certain threshold, it will set DTC P0231, which is defined as “Low Voltage Fuel Pump Secondary Circuit.” What are the common causes of code P0231 ?
What does p0231 stand for in fuel pump?
P0230 (fuel pump Primary Circuit Malfunction) 2.) P0231 (Fuel Pump Secondary Circuit Voltage Low NON-MIL) 3.) P1121 (Throttle Position Sensor Inconsistent With MAF Sensor Pending. I changed the…
Causes. Possible causes of OBD code P0230 GM. Potential causes of a P0230 GM code include: Short to ground on control circuit Fuel pump control circuit open Short to battery voltage on control circuit Harness chafing causing one of above conditions Bad relay Bad PCM.
Symptoms of a P0231 DTC may include: Potential causes of a P0231 code include: Harness chafing causing open in fuel pump supply circuit NOTE: If no drivability complaints are present and P0231 code is stored, suspect open in feedback circuit between splice and PCM
How is the fuel pump powered by the PCM?
The fuel pump is powered by the fuel pump relay. When the PCM (powertrain control module) activates the fuel pump relay, voltage is supplied to the fuel pump and it pressurizes the fuel system. Some vehicles have a feedback on the fuel pump supply circuit. This is simply a circuit spliced into the voltage feed to the fuel pump.