I have a 2002 Honda Accord EX V6 auto sedan with ~267k miles giving codes P0401 and P1399 with driveability issues. I've performed the EGR port cleaning throughout the car's life a few times even TSB 99-085 where the pipe kit is used in the manifold. EGR valve was replaced ~ 35k miles ago when I also cleaned the intake manifold last. But the P1399 code is different this time (I'm pretty sure) and driveability issues appeared quickly. So, I cleaned the intake manifold and all this weekend. It wasn't terribly clogged (seen worse on this car). Test drive revealed no issues and no code. Drove it to work this morning and code is back within 3 miles but no driveability issues until ~ 20 miles in. Car is running rough, bad miss, low on power, etc. This doesn't change if at idle, in neutral/drive, A/C on/off, etc. Same issues on the way home but driveability issues developed withing a couple miles of leaving work. Hmm.
New Honda EGR valves are now ~ $210 ($177 5 years ago) from online Honda parts departments.
Any thoughts on what else might be the issue? I don't see this P1399 code in the factory service manual.
Thanks.
New Honda EGR valves are now ~ $210 ($177 5 years ago) from online Honda parts departments.
Any thoughts on what else might be the issue? I don't see this P1399 code in the factory service manual.
Thanks.