SPN 3217, FMI 5 - EGO1 Open/Lazy (HO2S1

SPN 51, FMI 3 - TPS1 Signal Voltage High

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SPN 108, FMI 1 - BP Low Pressure

• Barometric Pressure • Check Condition-Key On, Engine Off or after BP estimate during low-speed/high load operation • Fault Condition-Barometric Pressure is less than x psia • Corrective Action(s): Illuminate MIL and/or sound audible warning or illuminate secondary warning lamp, disable adaptive learn fueling correction for key-cycle • Emissions related fault

Barometric Pressure is estimated from the MAP sensor at key-on and in some calibrations during low speed/high load operation as defined in the engine’s calibration. The barometric pressure value is used for fuel and airflow calculations and equivalence ratio targets based on altitude.

This fault sets if the barometric pressure is lower than x psia as defined in the diagnostic calibration.

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