OBD II Fault Code

  • OBD II P2543

OBD-II Code Decreased engine performance is defined as a Low Pressure Fuel System Sensor Circuit Intermittent

The Fuel Pressure Sensor monitors the fuel pressure in the fuel system going to the fuel injectors. If the sensor sends back an implausible signal, code P2543 is stored.

Decreased engine performance Symptoms

  • Decreased engine performance

Common Problems That Trigger the P2543 Code

  • Fuel pressure sensor failure
  • Powertrain Control Module (PCM) failure
  • Wiring issue
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