code question

[DavidGardner]

I have a friend who is a TDR member but dosent have a computer. He said he got a warning light and dosent know what it means. I told him how to access the code number by using the ignition switch to read the code. The code is P2121 anybody know what this means?



Thanks in advance.

David Gardner

 

[Motorhead]

Well the P2121 code is
"Pedal position sensor performance/rationality"

Is he having throttle loss problems?

 

[DavidGardner]

I forgot to say this is on a 2004 3/4 ton with the Cummins and auto trans. bone stock.