CM850 Electronic Control System – FAULT CODE 2373

Exhaust Gas Pressure Sensor Circuit – Shorted High


Fault Code: 2373
PID: P095
SPN: 1209
FMI: 3/3
LAMP: Amber

Exhaust gas pressure sensor circuit – shorted high. High voltage detected at the exhaust gas pressure sensor circuit.

Engine will be derated.

Exhaust Gas Pressure Sensor Circuit

Circuit Description

The exhaust gas pressure sensor measures the pressure of the gas exhaust in the manifold and passes that information to the electronic control module (ECM) through the engine harness. This information is used by the ECM to control emissions and EGR valve operation. If the exhaust gas pressure becomes too high, it will cause a derate condition.

Component Location

The exhaust gas pressure sensor is located on the EGR cooler on the exhaust side of the engine. Refer to Procedure 100-002 for a detailed component location view.

Shop Talk

The exhaust gas pressure sensor shares supply and return wires in the engine harness with other sensors. Opens and shorts in the engine harness can cause multiple fault codes to become active.

Possible causes of this fault code include:

  • Signal wire shorted to sensor supply or battery voltage
  • Open return circuit in the engine harness, connectors, or sensor.

Refer to Troubleshooting Fault Code t05-2373.

Last Modified:  06-Oct-2010