DTC P0400: Exhaust Gas RECIRCULATION (EGR) Flow Malfunction: Condition
WARNING: This page is about a different car, the 1999 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when difference in intake manifold absolute pressure value when EGR valve is opened and when EGR valve is closed is less than predetermined. MIL is illuminated when Power Control Module (PCM) detects malfunction during 2 consecutive drive cycles. Possible causes are:
- EGR valve malfunction.
- EGR passage restricted.
- Manifold Absolute Pressure (MAP) sensor or circuit malfunction.
- PCM malfunction.