Possible Causes

Malfunction is detected when no EGR flow is detected under conditions that call for EGR. Possible causes are:

• EGR valve stuck closed.
• EGR Control Backpressure Transducer (EGRC-BPT) valve.
• Vacuum hose.
• EGRC solenoid valve.
• EGR passage.
• EGR temperature sensor.
• Exhaust gas leaks.