In some cases with higher mileages, the Check Engine Light may come on due to insufficient Exhaust Gas Recirculation system (EGR) flow. For EGR flow concerns, the EGR valve is usually recommended for replacement and the intake manifold is removed to clean the EGR passages in the engine, which have clogged with carbon over time.
Average mileage: 132,750 (67,000–187,000)
Exhaust & Emissions affected: 5.0L V8, 5.8L V8
20 people reported this problem