code P 2121, 2122

[EB]

I guess I am losing my throttle petal position sensor with those two codes showing. The truck will go to idle at times and the only way to get it to run normally again is to shut the key off, let the engine die, then restart it. It has always come back to normal, but doing what I do, one of these days it won't, and I'll probably be a long ways from home. I have the sensor ordered, should be in tomorrow or the next day. Pretty expensive sensor, $400+. Anyone else had this problem?



EB

 

[EB]

Got the part in today but the mechanic said the code was not a hard code and really didn't want to change parts just to be doing something. Part was $487. He took the connections apart and cleaned them, said one connection was dirty, maybe that was it. I'm going on a 900 mile run tommorow. Should find out if that was the problem. Hopefully it was.

 

[rbattelle]

Take the replacement TPS with you, in case you have to change it out on the road!!



-Ryan

 

[EB]

OK, I was finally able to get the truck to the shop while it had the ck engine light was on (before it was always off) and we were able to do all the checks that were needed. It turns out one of the pins in the throttle position sensor was loose. The book said to do continuity (sp) ck while the sensor was off the engine and unpluged. They found one of the pins was loose and would show to be OK every now and then.

The symtoms I had was a surge while I was accelerating then a dead throttle petal. It would always come back, but I would have a ck engine light along with the 2121 and 2122 code. The light would go off after a while, but the codes stayed. The truck would run normally down the road, the surge would only come at low speed in 1st or 2nd gear. Once it got going, everything was normal until it happened again.

I say it is fixed, the next few days will tell. If it doesn't happen again this week, I'll be able to say it is fixed. I hope so, I hate to throw high $ parts at a problem.

 

[rbattelle]

So did they replace the TPS or were they able to repair the pin?



-Ryan

 

[EB]

We replaced the TPS, there was no way to know what the problem might be under where the pin went through into the sensor.