So I was driving ot the grocery store and there's a strech of road thats 55mph. I get up to 55 and notice the truck's louder than normal. look at the cluster and there's a CEL and the RPM's are way up in third gear like it hasn't grabbed overdrive.

Checked the code when I got home and its P0121.

What is that? The old OBD code site doesn't list any P codes anymore as they are Copyrighted.

 

TPS

 

Thanks PA,

A new, unmodded TPS fixed everything, even the rough idle. I'll let it sit overnight and check it cold to verify.

Kind of funny, the one mod WayneC has done, I don't want any part of.

Maybe I should change my Sig to "Goin' back to Stock"

 

its a hit or miss...