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 calculates the density of air(quantity of oxygen) and accurately detects the intake air amount along with intake air temperature sensor. This does an important role in compensating the amount of fuel when driving in hillsides areas where difference in air density(oxygen) exists.

DTC Description

The difference between values coming from the BPS Sensor and those are calculated is analyzed. PCM compares the difference between BPS output and calculated value while enable condition is met.
If the acutal BPS is higher or lower than calculated value(threshold) for more than 31.25sec.
PCM determines that a fault exists and a DTC is stored.

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram





Signal Waveform & Data




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