Component Location
Description
1. General Description
Atomspheric pressure sensor is used to detect the change of barometric pressure that alters the intake air density, resulting in improper air-fuel ratio. To compensate this deviation, the amount of fuel injected is controlled. For example, the amount of fuel injected is decresed to compensate for the lower intake air density caused by the decreased barometric pressure.(high altitude) Atomspheric pressure sensor is located in the ECM. In case of the barometric pressure sensor failure, the engine symptoms will occur as follows. Barometric pressure is fixed value of 900 hPa by ECM when the boost pressure and the barometric pressure sensor are defective at the same time.
2. DTC Description
If an extremely low or high altitude is being read by the barometric pressure sensor during two driving cycles, this code will be set .
DTC Detecting Condition
DTC NO. | Detecting Condition | Possible Cause |
C 001 C 002 | ? C 001 : Output signal < 1.5 mV ? C 002 : Output signal > 4.9 V ? Engine Condition : IG ON ? Fuel Limit : NO ? Fuel Cut : NO ? EGR OFF : NO ? MIL : NO | ? Atmospheric Pressure Sensor ? ECM |