Most of the time when a new computer is installed the new must be programmed with the information from the old computer or the information must be entered for the specs of the vehicle. Usually only a dealership can do this or a company that specializes in this sort of thing. The battery should have been disconnected during this replacement you should just connect the battery. It will take a bit of driving it for the new computer to adapt to the vehicle sensors and such. You might get some bad gas mileage at first few miles, but then it should get better. This has been my experience, anyway. Hope this helps. Good luck.
COMPUTERS GENERALLY RESET THEMSELVES WHEN YOU DICONNECT THEN RECONNECT THE BATTERY
disconnect the battery
The check engine light for the 2001 Isuzu Rodeo often comes on because of a sensor that is damaged or malfunctioning. The most common sensor is an oxygen sensor and when reset, this often allows the light to be reset.
The last Isuzu Rodeo was in 2004.
i turned key on to the on postion and let it set for 15 min
Yes
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Yes.
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