Thread: P401 Code On 00 GTP

My 2000 GTP threw the SES light and I brought it to auto zone and it ran code P401, which I know is a EGR issue. I guess my question is I know there are a few diff egr codes, for this should I start by trying to clean the EGR? I actually disconnected the battery to clear the code just to make sure it wasnt a loose piece of carbon that pulled through it stayed off for about 24 hrs and came back....the thing is that my car is running fine, no idle issue or anything, so could it be that its just barely at the tolerance to trigger the light?

Also, I keep seeing that there is an issue with plastic intakes on pontiacs, are the intake manifolds plastic on the supercharged model as well? Just wondering if anyone has battled this code in particular and if there was a weird cause Thanks guys!

Thanks for the help, any other ideas? Its easy enough to clean tha tI will try that first. Nothing major is going to go wrong driving the car around town due to the egr right?

egr is just for emissions, so it wont effect driving. also, its only on when cruising, so its not even on during idle or wot.

only thing i can think of that may be affected is gas mileage, but that will still be minimal.

another option you could do would be delete it all together. get a couple block off plates for the exhaust and intake, and have the codes removed from the pcm. is your car stock?

car has a one size smaller SC pulley, and a K and N style intake, but those are the only mods....I will try giving it a good cleaning and see how that does......