Hi,
On my 1998 s10 2.2 I sometimes get a SES light about 20 minutes after turning on the AC.
The idle goes to 1100rpm as it should, but sometimes stays at around 1500rpm.
The SES light usually goes out by itself after being parked a while or overnight.
I have a 122 code which is Throtle Position Sensor circuit low input.
Will changing the tps fix this?
Angelo