CM850 Electronic Control System – FAULT CODE 2353

EGR Valve Control Circuit – Current Above Normal or Grounded Circuit


Fault Code: 2353
PID: S146
SPN: 2971
FMI: 6/6
LAMP: Amber

Exhaust Gas Recirculation (EGR) valve control circuit – current above normal or grounded circuit. Excess current detected at the EGR valve motor output circuit.

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

EGR Valve Motor Output Circuit

Circuit Description

The Electronic Control Module (ECM) controls the EGR valve, opening and closing it based on various operating conditions. The EGR valve is opened and closed by a DC motor that receives voltage from the ECM on the EGR valve motor SIGNAL (+) and (-) circuits. To open the valve, the motor receives voltage on the EGR valve motor SIGNAL (+) circuit. To close the valve, the motor receives voltage on the EGR valve motor SIGNAL (-) circuit.

Component Location

The EGR valve motor is located on the exhaust side of the engine and is attached to the EGR valve assembly, which is mounted to the exhaust manifold. Refer to Procedure 100-002 for a detailed component view.

Shop Talk

The ECM monitors the current draw of this circuit. If the ECM detects excessive current for a calibrated period of time, it records this fault.

Possible causes of this fault include:

  • EGR valve motor (+) or (-) leads shorted together in the engine harness, EGR valve motor, or ECM
  • Low EGR valve motor internal resistance.

Refer to Troubleshooting Fault Code t05-2353

Last Modified:  08-Jul-2010