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I would appreciate a reply from any of you guys. My '96 5L tripped the CEL and I got the P0402 code too. This has been a problem for 8 or 9 months (ok, I'm slow.) Frankly, other than starting rough, the truck runs fine. By the way - Autozone checks the codes for free - you don't have to buy...

Thanks for the help. Took a while, but I finally got the CEL code: P0402. Autozone folks tell me that it has something to do with the exhaust: EGR, DPFE sensor, and / or the OX sensors. This is the thing: its a little hard to start the engine, but it always does start and then runs like a...

Am new to your forum. Have checked all the old threads and I see a lot of confusion about EGR, DPFEs, ox sensors, all leading to check engine lights. Well, here's another.... The CEL on by 106K mile V8 has been on & off for several months. Finally had the dealer check it - don't know the...