P1244, P0105

ALTITUDE COMPENSATION (AC)

Monitoring Procedure
The sensor output is continuously monitored for high and low value. If a sustained high or low output is seen, the circuit malfunction diagnostic trouble code (DTC) is stored.

The sensor output is monitored while the engine is running. If the sensor indicates a value which is much lower than either manifold pressure sensor is currently indicating, the AC sensor range / performance failure judgement is made. The DTC is stored if the failure judgement is made on two successive trips.

The AC sensor is internally fitted in the ECM. It is not serviceable part.