CM850 Electronic Control System – FAULT CODE 2554

Exhaust Pressure Sensor Circuit – Data Erratic, Intermittent, or Incorrect


Fault Code: 2554
PID: P095
SPN: 1209
FMI: 2/2
LAMP: Amber

Exhaust pressure sensor circuit – data erratic, intermittent, or incorrect. An error in the exhaust pressure sensor signal was detected by the ECM.

Engine power derate. Exhaust Gas Recirculator (EGR) valve will be closed.

Exhaust Pressure Sensor Circuit

Circuit Description

The exhaust pressure is used by the electronic control module (ECM)
to monitor the engine exhaust pressure. This information is used by the ECM to control emissions and EGR valve operation.

Component Location

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

Shop Talk

At key-on, before the engine is started, the readings for intake manifold pressure, barometric pressure, and exhaust pressure are compared. This fault code occurs if the exhaust pressure sensor reading is different from the other two. This check is only done once after the keyswitch is turned on. This fault will not occur while the engine is running.

Refer to Troubleshooting Fault Code t05-2554

Last Modified:  08-Jul-2010