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Electronic Control Module (ECM) Microprocessor
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Overview
CODE | REASON | EFFECT |
Fault Code: 111 PID: S254 SPN: 629 FMI: 12 LAMP: Red SRT: |
ECM internal hardware error. |
Possible no effect or engine will possibly run rough or not start. |
![]() ECM Microprocessor
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Circuit Description
The ECM is a computer that is responsible for engine control, diagnostics, and user features.
Component Location
The ECM is located on the left side of the engine block.
Shop Talk
This fault code can be caused only by an internal ECM problem. Field repairs are not possible for the ECM.
Refer to Troubleshooting Fault Code t05-111
Last Modified: 26-Oct-2010