New LIM Gasket now I get a P0401 code....

[biohazed]

I changed my LIM gasket and my UIM gasket last week and my coolant sensor which got broke in the process of working on it .. car ran great on monday all the way home from work. This morning i started it up and had a check engine light exen before i left the drive way... got to work and had a P0401 Low Exhaust Gas Circulation code ... so I cleared the code and drove it for a while nothing i went home for lunch .. left to go back to work and code came back ... I knoe the EGR stove pipe is installed correctly and i connected the pipe from the EGR valve to the manifold back up ... anyone else have any idea what would cause this ... I haven;t had a chance to look at it as my car is banned from the shop for being in the shop for a week lol

[irkwerks2]

Easiest place to start is the MAP Sensor...
Make sure you plugged it back in. Make sure it is clean. (Map sensor clearer...DO NOT break the filaments inside). If your car has a vacuume lime to the MAP make sure it is not broken, kinked or resricted in some way.

If that doesn't work remove EGR Valve and inspect for restrictions from deposits at the pintle, valve passages or adapter. Also look for deposits on or in the inlet and outlet pipes.

Check both of the electrical connectors to the EGR and MAP for any obvious loose/broken wires and inspect the pins for corrosion/ non-contact.


I'm gonna just sit here and eat these chips.

[Archon]

I agree to check the MAP, as the computer looks for a change in the manifold pressure when it runs the EGR test. Check to be sure the vacuum connection didn't come lose, and that the electrical connection is snug. There's nothing to clean in the MAP, and no wires. Those are in the MAF on the throttle body.

Check around the gasket for the EGR, and all the EGR pipes for any leaks or cracks. Also, check for anything blocking the tubes. The pipes will usually crack where you can't see it well. If everything is good, you could try cleaning the EGR valve, but that doesn't always work. If all else fails, you could have a bad EGR valve.

[irkwerks2]

my bad your right...for get the cleaning part