CM870 and ISX Engines – FAULT CODE 2272

EGR Valve Position Circuit – Voltage Below Normal or Shorted to Low Source


Overview

CODE REASON EFFECT
Fault Code: 2272
PID: P27
SPN: 27
FMI: 4/4
LAMP: Amber
SRT: 

Exhaust Gas Recirculation (EGR) Valve Position Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at EGR valve position sensor circuit.

Possible low power. Power will be removed from the EGR valve motor.

EGR Valve Position Sensor Circuit
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Circuit Description

The EGR valve position sensor outputs a voltage signal to the electronic control module (ECM). The ECM converts this signal into a percentage value, from 0 to 100 percent, indicating valve position. A fully open valve is equivalent to 100 percent.

Component Location

The EGR valve position sensor is located on the EGR valve assembly. Refer to Procedure 100-002 in Section E.

Shop Talk

The EGR valve position sensor shares supply and return wires in the engine harness with other sensors. Open circuits and shorts circuits in the engine harness can cause multiple fault codes to be active.

Possible causes of this fault code include:

  • Signal circuit open or shorted to ground
  • Supply circuit open or shorted to ground
  • Sensor shorted to ground
  • Damaged EGR valve.

Refer to Troubleshooting Fault Code t05-2272

Last Modified:  02-Sep-2010