Detection Condition

WARNING: This page is about a different car, the 2003 Mazda MPV and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.

PCM measures purge line pressure/vacuum. DTC is set, if vacuum between charcoal canister and intake manifold does not reach a predetermined specification. Monitoring is performed when following monitoring conditions are met:

Engine speed at 1100-2700 RPM.
Throttle angle at 11-25 percent.

This is an intermittent monitor. MIL is illuminated if PCM detects malfunction in 2 consecutive drive cycles