Can't get rid of p2135 code

[HACK BLOCK]

lately I've been getting rough cold starts/rough idle till the engine warms up. I get a mix of c0242 p0121codes but one constant code in getting is p2135 along with stablitrack, traction control, reduced engine power messages. I tried cleaning out the throttle body and all was good for a few days then it started back again. I searched Google and majority of the feedback is to just replace the sensor but rather then throw parts at it I'd like to actually go through the steps to be certain.

 

[wsteele]

What make/model, year, displacement, etc?

 

[OR VietVet]

His signature says 2011 Yukon Denali.

 

[Foggy]

My opinion is that your throttle body/tps assembly is shot
You "can" replace just the TPS, but it's gonna come back and bite ya..
just replace the whole unit. Then do your throttle relearn procedure thru your tech II

 

[Doubeleive]

 

[HACK BLOCK]

if I replace just the sensor then how would I have any future issues?

 

[Doubeleive]

if I replace just the sensor then how would I have any future issues?

I think you can only get aftermarket ones, gm does not sell the sensor alone, personally I would just replace the throttle body they are not very much especially from ebay rock auto amazon

 

[HACK BLOCK]

I see just the sensor on RockAuto.

acdelco 19259452

 

[HACK BLOCK]

anyone can guide me to the proper steps to diagnose this. I hate to spend unnecessary $$

 

[wsteele]

His signature says 2011 Yukon Denali.

Not sure how I missed that. I was posting on his catch can thread and kept looking for model, year etc. and for some reason never saw it.