How to reset computer for 2002 BMW


Asked by Aug 24, 2015 at 09:47 PM about the 2002 BMW 3 Series 325i

Question type: Maintenance & Repair

Radiator shop replaced new radiator along with top and bottom hoses. After
replacement when I start car I got engine service signal. Radiator shop did not have
diagnostic meter to reset the computer. Auto parts store checked and found out that
the code is P1112 "Engine Coolant temperature radiator outlet   sensor high input".
How can I reset computer to delete alarm. I do not want buy new gadget but like to
know if any way I can reset compter myself.

4 Answers


Let the radiator shop do it. Sounds like they forgot to plug the sensor back in after the repair. Even if you clear the computer the light will come back on immediately with the sensor unplugged. HTH. -Jim

1 out of 1 people think this is helpful.
Tom Demyan

JS is right, the lower radiator hose has the bung where the coolant sensor attached to it. Open the hood and look down on the passenger side and see if it plugged in?

1 out of 1 people think this is helpful.

Yes it is plugged in. You know how radiator shops are with minimum tools and may be most of them do not carry computer analyzer. I will try to ask radiator shop but if not what can I do. If I disconnect battery will it reset computer. I hate to buy the gadget unless I have to. Any recommendation which will do the job. I do not want to sepnd like professional.


You can buy a hand held code reader for around $50. You can use it to clear the computer and have it if the check engine light comes on in the future. I think it's a worthwhile investment. HTH. -Jim

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