Engine Control Module Warning Internal Hardware Failure – Bad Intelligent Device or Component
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Overview
CODE | REASON | EFFECT |
Fault Code: 343 PID: S254 SPN: 629 FMI: 12/12 LAMP: Amber SRT: |
Engine Control Module Warning Internal Hardware Failure – Bad Intelligent Device or Component. |
No performance effects or possible severe power derate. |
![]() Electronic Control Module
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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 fuel system side of the engine. Refer to Procedure 100-002 for a detailed component location view.
Shop Talk
This fault code can only be caused by an internal ECM problem. Repairs are not possible for the ECM.
For Euro certified engines this fault code indicates that the Real Time Clock feature needs to re reset (if equipped).
Refer to Troubleshooting Fault Code t05-343
Last Modified: 08-Jul-2010