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Challenger code
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c_mayer
Posted 4/19/2024 18:06 (#10712914 - in reply to #10712901)
Subject: RE: Challenger code


Jeffersonville, OH
SPN 27, FMI 7, EGR Valve position deviation
Description

The EGR actuator difference between the actual and the target shaft position is too high. The error will heal when the difference grows smaller.

Possible causes are:

The EGR actuator is defective.
The EGR actuator shaft is twisted or blocked.
The CAN bus is defective.
Reaction in EEM

The FC is stored and the warning lamp is activated. The CAN message indicates active fault.
Solution

First save the error log and then erase it. Restart the ECU after erasing the error log. If the fault occurs again during the next driving cycle, check the following paths:

Check the EGR actuator assembly to detect the defective control shaft.
Check the operation with another EGR actuator to see if the actuator is defective.


Make sure EGR valve in the exhaust manifold isn't stuck. I have had to free them up after sitting a few months. If it is, get it free, and the problem should clear itself.

Chris
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