[wolff051096]

The van started running rough yesterday. Idles rough mostly. Driving the CEL flashes. I got all the codes most were for cylinder misfires but I think those are being caused by this one. I know it is for the evaporative seytem back pressure sensor. So my question is were is this sensor, can it be cleaned, and what does it do. any help is appreciated. 1999 with about 126,xxx miles

Wolff

 

[stangsteve]

Is it a p1491 ? I don't see a p1451 code. If it is a p1491, check the egr valve and clean the egr ports. If its a p0451, there is a bulliten for that #99-056. The sensor is by the vapor canister. Steve

 

[New Dad New Van]

Yes, check that code.

If it is P1491 (which is very common for your 1999), see this thread for the TSB to correct: http://www.odyclub.com/forums/24-1999-2004-odyssey/22959-99-01-p0401and-p1491-egr-tsb-here.html