UK Car Repair Questions? Ask a Mechanic for Answers ASAP
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If the engine appears to running ok, then it is only minor.
If and when it starts to run rough, the EGR valve assembly should be replaced.
Ive seen a few engines wear excessively from stuck open EGR valves.
Hope this helps you.
The engine light may come and go, but the code will stay in history until it gets investigated further.