P2A00 O2 Sensor Code

[ORacer]

I have been getting a P2A00 code while running at speed, does not seem to affect performance but it smells like the exhaust is running rich with diesel smell. Any ideas?

On a second matter, the yellow light that comes on start up 'asking' you to wait until it goes out before you start...well it's summer so it has not been coming on at start up. I was on the coast a few days when it was around 60 degrees air temp and the yellow light still did not come on. Seems odd.

Any help much appreciated.

Truck is a 2007 2500 RAM with 6.7 liter Cummins.

Thanks

John

 

[ORacer]

I tried searching the code but could not find any results which was surprizing as I would have thought all the emmision type problems would have been discusses infinitum

Any help appreciated

 

[xtremewlr]

Try this?

P2a00 Dodge O2 Sensor 1/1 Circuit Performance OBDII Engine Light Trouble Code | Engine-Codes.com

 

[ORacer]

Thanks extremwir for the link, I am guessing that there is an issue with the MAF sensor but I have no mechanical skill to figure this out.

Has anyone else experinced this problem (or my question about the yellow start up light) and any recomnmended methods to determine the faulty part.