Detection Condition

Diagnostic Trouble Code (DTC) is set when Powertrain Control Module (PCM) monitors barometric pressure by monitoring difference between intake manifold vacuum and atmospheric pressure at idle. PCM monitors atmospheric pressure at idle by using EGR boost sensor and by switching EGR boost sensor solenoid. DTC is set when barometric pressure variation is below 1.8 in/Hg (6.4 kPa). This is a continuous monitoring (CCM). Malfunction Indicator Light (MIL) illuminates if PCM detects this malfunction conditions in 2 consecutive drive cycles. Pending codes is available if PCM detects malfunction during first drive cycle. Freeze Frame Data is available and DTC will store in PCM memory.