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Home >> Ford >> 2001 >> Excursion 6.8 S, RWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls Self-Diagnostics - EEC-V - CNG & Gasoline - Introduction, Self-Diagnostic System, Additional System Functions, Programming Pcm, Diagnostic Trouble Code Definitions, How To Use System Tests >> Additional System Functions >> Hardware Limited Operational Strategy
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Hardware Limited Operational Strategy

If a number of system or sensor failures are present and PCM is not receiving enough information to operate, PCM will switch to HLOS mode. PCM will output fixed values to allow operation of vehicle. Driveability problems will be present. PCM will not output diagnostic trouble codes in this mode.

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