these are the type of codes that should go to a dealer due to they affect
emissions

Marvin Oliver wrote:

> check engine codes are
> p0203,p0202, p0204, p0206, p0207, p0208, and p0121
>
> Engine does not seem to be missing so I don't know why the first six codes.
> The rpms will change suddenly when at and idle or just sort of coasting
> (very little gas applied).
>
> How do I check the throttle position sensor? Is it possible that there is a
> common cable/plug for all these codes that could be causing the problem?
>
> tia
> jim