Help with ECU reset with CEL
Just bought a 97 D90 LE #135. Took the car to the dealer for an inspection so I could pay tax and noticed the Check engine light had come on. The dealer reset the CEL (speed sensor issue) and it has not come back on sense then. My issue is the computer has not reset itself so the dealer can perform the inspection. The inspection diagnostics shows it cannot perform the oxygen sensor and catalytic converter test.
Question, do you guys know how many miles, how long it should take for the computer to reset itself. I so far have driven it more than 200 miles and the diagnostics still won't allow the computer to reset.
Any help is greatly appreciated!