do I have to reset error codes after replacing oxygen sensors

75

Asked by Sep 15, 2014 at 10:13 AM about the 2000 BMW Z3 2.3 Convertible

Question type: Maintenance & Repair

had a rough idle- got the codes read and replaced oxygen sensors, but still won't idle--- actually it's worse now- do the codes have to be reset for it to get a reading from the new sensors?

18 Answers

34,995

I have a way you can clear the codes BUT you will need the radio code an DO NOT leave the key in the ignition!!! - Disconnect the battery for about a half hour. That will clear thecodes. BTW did you get the discount one size fits all O2 sensor? Did you replace all of them or just the targeted bad one? Unwritten rule of thumb. Replace all O2 sensors when one go's bad they all need to be replaced.

5 of 5 people found this helpful.
75

thanks for the tip on the battery disconnect- yes I replaced all sensors (actually got error codes for all). The car has an aftermarket sound system so radio code shouldn't be an issue.

Hi, B-Mark. good call there

34,995

Hey F.N. do you think that maybe the catalytic converter could be the problem?

1 of 1 people found this helpful.

I took down my post b/c I shouldn't spout about things I don't know, but I do know the codes can be cleared with a scanner also.

1 of 1 people found this helpful.

Yes...very well could be. jake exactly what codes did it throw? I am good at research if nothing else..I am also thinking vacuum leak, un-metered air, from that or faulty MAF. It's 15 years old and these things will begin to happen

34,995

Yes and if you tip the guy at AutoZone $5.00 he'll do it for you....... Or so I have heard.

1 of 1 people found this helpful.
75

I guess my real question is: do the codes HAVE to be cleared before the new O2 sensors will start working? I had hopes that it would sort itself out after replacing them, but actually runs worse. I'm going to try the battery disconnect when I get home. If that doesn't work, I'll let it spit & sputter all the way to the parts store & have them clear the codes with a reader.

7 of 7 people found this helpful.

also jake, cats get hot, very hot normally but I have heard about them getting so hot they get literally red hot, and the heat ruins a brand new downstream sensor and the ECU doesn't know what to do to set the fuel/air trim

jake if you plan on keeping your car for a while, a good scanner will run you about $200..they have cheaper ones, I spent $259 for an Actron CP9580A. It's money well spent

34,995

I had that happen in a ML 320 a few years ago. Sold it and got a F350 with the 7.3 diesel. Loved the Mercedes. But man I could always rely on the Ford!

1 of 1 people found this helpful.

B-Mark is it a Powerstroke? and this is the scanner I bought jake

1 of 1 people found this helpful.
34,995

Did they pass the law that allows John Q. Mechanic to be able to get the dealers "Secret Service FYIO Codes?" Before I was exciled from TAXACHUTTES there seemed to be a good possibility that was going to happen.

34,995

Yeah it was. I sold it just before I moved to the Philippines. Best truck I ever owned. I miss it more than some of my relatives. I think I told you I found a 2000 Excursion here. 45,000 kilometers on it for$20,000 (more or less) but its in Manila and I am a 24 hour boat ride away. I'd love to get it. It's bullet proof and the way people drive here..........

1 of 1 people found this helpful.
75

thanks guys- yeah even if I get rid of this car, I'll be getting another BMW (I've got 241,000 miles on this one so far)-- so I'll be investing in a code reader/reset tool. In the meantime, I'll try the battery disconnect and/or tipping the guy at the parts store to clear the codes so I can make sure I don't have any "deeper" issues.

75

I left battery disconnected for an hour- no change, so I left it disconnected over night- no change, so I'll stop by the parts store on the way home from work and have them re-check & clear the codes. If that doesn't help, I guess I'll fold & take it to the mechanic... I think it wouldn't hurt to have a smoke test done on the vacuum lines.

10

I need help. I took my 2011 BMW 328i for a carwash. The car was on while I was going through the carwash service. After I finished I pulled over and my ABS, Braque, traction control, and service engine soon lights on. The car drives like always but all that its boring me about. The miles in my car are 50,000.

1 of 1 people found this helpful.
10

Wet ECU. check your computer circuit board

1 of 1 people found this helpful.

Your Answer

Z3

Looking for a Used Z3 in your area?

CarGurus has 303 nationwide Z3 listings starting at $2,500.

ZIP:

BMW Z3 Experts

  • #1
    Tom Demyan
    Reputation
    350
  • #2
    Kelly Mayo
    Reputation
    250
  • #3
    Sleveillee
    Reputation
    220
View All

Related Models For Sale

Used BMW Z3 M
95 listings starting at $5,995
Used BMW 3 Series
1,052 Great Deals out of 31,684 listings starting at $1,000
Used Mazda MX-5 Miata
71 Great Deals out of 4,235 listings starting at $2,000
Used Porsche Boxster
42 Great Deals out of 1,144 listings starting at $3,995
Used Chevrolet Corvette
246 Great Deals out of 22,203 listings starting at $2,500
Used Ford Mustang
771 Great Deals out of 42,663 listings starting at $1,300
Used BMW M3
48 Great Deals out of 1,480 listings starting at $4,990
Used Audi TT
30 Great Deals out of 794 listings starting at $1,995
Used Mercedes-Benz SLK-Class
53 Great Deals out of 1,174 listings starting at $2,991
Used Honda S2000
10 Great Deals out of 388 listings starting at $6,450
Used Chevrolet Camaro
419 Great Deals out of 31,911 listings starting at $2,395
Used BMW 5 Series
458 Great Deals out of 16,577 listings starting at $2,000

Used Cars For Sale

2000 BMW Z3 2.3 Convertible For Sale
53 listings starting at $3,645
1999 BMW Z3 2.3 Convertible For Sale
11 listings starting at $3,000

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.