i was wondering what could be wrong i just had my egr replace and my engine light shows up again at reseting the engine code and the code came up p0401 i was wondering what it could be?
My car has 210000 miles.
My car has an automatic transmission.
It is possible that the EGR tube that connects the intake manifold to the exhaust system is clogged with carbon. I would recommend having this tube cleaned out. I would also recommend having a 3M 3 part fuel system cleaning done on your vehicle. This will clean out most of the carbon inside your vehicle’s engine. These 3M kits are available at Wal-Mart and are fairly easy to do yourself. After completing these tasks, clear the check engine light code again and it should not come back.
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