Originally Posted by poorman212
Did they (autozone) reset the codes? If so, did they come back?
Anyway, the "tree" if you will on the P0740 says to address any other codes first. Which in your case is the 1676.
Thanks poorman for the instructions... I think as a novice, i can perform the steps 1 and 2 (reset the PCM. i guess it means take off -ve battery terminal and then start the car and see if the code reappears). Is my understanding correct? Any further steps that i can do without any tools/experience? thanks.
No, they (AutoZone) did not reset the codes.
But today when i started driving the car, after about 30 mins, the TCS light came ON again. When i restarted the car, it went off. CEL is still ON.
I observed less tire pressure and also the tires are old and due for change.
I checked the RPMs at various speeds today and it looks normal to me. The transmission shifts just fine for all the speeds. It stays at ~2K rpm on 70mph and ~3K rpm on 80 mph. For every shift, it goes to near 3K and then shifts back to ~2K in the next drive gear.