Pcm Code P048 - EGR System Fault: Action
PCM turns on SERVICE ENGINE SOON light for entire key cycle and EGR is disabled for entire key cycle.
NOTE:
Test numbers refer to numbers on diagnostic chart.
- Checks for EGR operation using PCM override.
- Checking EGR gases entering intake manifold by raising EGR valve off of its seat.
- Checking EGR solenoid ability to pass vacuum.
- With engine at idle, EGR solenoid should be energized. Test light across EGR solenoid terminals should be illuminated.
- Checks PCM's ability to turn off EGR solenoid.