Exhaust Pressure Sensor Circuit – Data Erratic, Intermittent, or Incorrect
|Fault Code: 2554
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
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.
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.
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.