Topic: problem i can't fix

[dtoliver]

I have a 95 2.5L, completely stock. I keep getting engine codes 24 (TPS), 21 (02 sensor) and 51 (02 sensor). I changed the oxygen sensor about 7,000 miles ago and the light went away for a while. It came back with the same codes so I changed the TPS sensor about 3,000 miles ago and the light went away again. Now the same codes are back. Could there be anything underlying that's causing this. Someone told me it could be carbon build up (my engine oil does get dark quicker than it should). Would a good throttle body cleaning and maybe new injectors work? The engine has about 107,000 miles on it.

[sharpxmen]

did you clear the codes after replacing those sensors?

[dtoliver]

do you need to still clear them if the light went off after changing the sensor? It stayed off for a couple of months.

[sharpxmen]

do you need to still clear them if the light went off after changing the sensor? It stayed off for a couple of months.

I think (and someone correct me if I'm wrong) the light goes away but the last codes are still stored in the PCM, when you read the codes they will be displayed even if the CEL is not on. So in order to get the last problem you have to clear the codes then drive it until the CEL is lit and read the codes again.