How to reset computer for 2002 BMW

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

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 of 1 people found this helpful.

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 of 1 people found this 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

Your Answer

3 Series

Looking for a Used 3 Series in your area?

CarGurus has 32,864 nationwide 3 Series listings starting at $1,300.


BMW 3 Series Experts

  • #1
    Tom Demyan
  • #2
    Robert Charlson
  • #3
    Matt Mankinen
View All

Related Models For Sale

Used BMW 5 Series
388 Great Deals out of 15,959 listings starting at $1,650
Used BMW M3
19 Great Deals out of 1,727 listings starting at $5,495
Used Mercedes-Benz C-Class
596 Great Deals out of 25,138 listings starting at $1,950
Used Audi A4
192 Great Deals out of 12,314 listings starting at $1,700
Used Ford Mustang
278 Great Deals out of 38,263 listings starting at $1,995
Used Honda Accord
539 Great Deals out of 91,748 listings starting at $1,495
Used BMW 7 Series
111 Great Deals out of 4,995 listings starting at $2,699
Used BMW X5
339 Great Deals out of 16,973 listings starting at $2,991
Used Mercedes-Benz E-Class
420 Great Deals out of 20,559 listings starting at $1,999
Used BMW 6 Series
49 Great Deals out of 2,406 listings starting at $5,995
Used Chevrolet Camaro
252 Great Deals out of 29,972 listings starting at $4,980
Used Honda Civic
362 Great Deals out of 50,912 listings starting at $1,200

Used Cars For Sale

2018 BMW 3 Series For Sale
64 Great Deals out of 8,505 listings starting at $27,935
2017 BMW 3 Series For Sale
84 Great Deals out of 2,635 listings starting at $23,350
2016 BMW 3 Series For Sale
40 Great Deals out of 1,017 listings starting at $15,350
2015 BMW 3 Series For Sale
159 Great Deals out of 3,984 listings starting at $13,470
2014 BMW 3 Series For Sale
182 Great Deals out of 3,240 listings starting at $9,977

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.