Barometric Pressure Out of Range

Name of Code:
Barometric Pressure Out Of Range

When Monitored:
With the ignition key on at less than 350 milliseconds and engine speed at less than 255 RPM.

Set Condition:
The PCM senses the voltage from the MAP sensor to be less than 2.196 volts but above 0.019 volt for 300 milliseconds.

Theory of Operation:
The MAP sensor voltage is used by the PCM to determine the barometric pressure within the manifold. The PCM uses that value as an altitude reference to determine the adjustments to the fuel control mixture.

Possible Causes:
- MAP sensor Failure
- PCM failure
- Connector terminals
- Connector wires