General Information

Engine Control
P2227 Barometric Pressure Circuit Range/Performance - General Information

Component Location





General Description

The Barometric Pressure Sensor (BPS) is located between the air cleaner assembly and the throttle body. It detects the atmospheric pressure at the vehicle's current location. The barometric pressure sensor signal is used to calculates the density of the air. The Barometric Pressure Sensor plays an important role when driving in the mountains and in different altitiudes.

DTC Description

In the case of sensor failure, in many cases, the PCM will calculate a value to substitute for the failed sensor signal. The PCM can also use this calculated value to check the performance of working sensors by comparing the sensor's actual value to the calculated value. If the actual BPS is higher or lower than calculated value(threshold) for more than 31.25seconds the PCM determines that a fault exists and a DTC is stored. Because the calculated value is based on other sensor outputs, an inaccurate sensor signal will change the calculated value. If no problem is found with the Baro sensor, check the other sensors.

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram





Signal Waveform & Data




Fig 1) Normal data & waveform of BPS at approx. 1 atm condition.