Detection Condition

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