P2543

P2543 OBD Code Definition:
Low Pressure Fuel System Sensor Circuit Intermittent
P2543 OBD Code Description:

OBD Code P2543

Possible Symptoms

  • MIL on
  • Driveablity issues

Possible Causes

  • Restriction in fuel line system
  • Failed Lift Pump in Fuel Tank

Possible Solutions

  • Replace restricted fuel lines
  • Replace restricted fuel filter
  • Replace failed Lift Pump

Special Notes

  • When found on FSI engines, MVB 106.2 shows the duty cycle of the lift pump, this value should be below 70%. The higher the number, the more the lift pump has to run to maintain fuel pressure to the High Pressure Fuel Pump.

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