My '95 2.2L Odyssey has the code 12 showing up for EGR problem.
This only happens when the engine is started from cold and once its driven a few hundred meters the check engine light will come on.
Any starts after the engine is warmed up and the light stays off.
I have cleaned the EGR ports by removing the plate on the manifold. There was a lot of carbon to clean out yet none of the ports were actually blocked. However the light still comes on as before.
What should I check next ?
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