DTC Set Conditions

• At least 20 seconds have passed since the last monitor was complete.
• Engine coolant temperature is more than 169°F (76°C).
• Engine speed is 940-2000 RPM.
• Intake air temperature is more than 32°F (0°C).
• Barometric pressure is more than 11 psi (76 kPa).
• Vehicle speed is more than 18.7 MPH.
• More than 90 seconds have passed since Manifold Differential Pressure (MDP) sensor output voltage fluctuated 1.5 volts or more.
• The throttle valve must be closed.
• Volumetric efficiency is less than 24 percent.
• The PCM monitors for this condition for 3 cycles of 2 seconds each during the drive cycle.

Judgement criteria is when intake manifold pressure fluctuations width is less than 0.38 psi (2.6 kPa) when the EGR solenoid is turned on.