the O2 sensor out of useable range. Meaning, it could have failed or something else is dumping too much fuel into your engine or not burning enough of the fuel that is being dumped in. Most likely culprit is the DI.

Hopefully I can explain this well enough without over explaining. If your DI is weak/failing you will be passing unburned fuel into your exhaust. Your O2 sensor will realize this rich condition and try to make an adjustment to your computer. The computer adjusts many things from ignition timing to fuel injector opening timing and duration. If for some reason it can't maintain it's programmed levels it will throw the CEL code. O2 code doen't necessarily mean that your sensor failed, it means something has taken your O2 sensor out of range. It could be a failed sensor, but it could be a failed DI, Coolant temp sensor, Crank position sensor, MAF sensor. To me, logically thinking, the easiest part to verify is the DI because you can change it without a lot of time and relatively clean. If it restores running condition, the O2 code will disappear when you reset the computer.

Good Luck
David
91 9000CD turbo
93 BMW 740iL

posted by 69.128....

• Check Engine Light and Poor Performance, Julia, Tue, 26 Apr 2005 16:49:43
  • Re: Check Engine Light and Poor Performance, TBellisario, Wed, 29 Jun 2005 09:53:14
  • I replied to your post above and agree that your, David, Wed, 27 Apr 2005 06:32:05
  • Do you really want to pay for their education?, Urby, Wed, 27 Apr 2005 05:47:48
    • Thanks, Urby...now...The 6-Flash Issue..., Julia, Wed, 27 Apr 2005 06:45:52
      • Julia, a O2 code can be thrown by anything that takes, David, Wed, 27 Apr 2005 08:23:17 <-- Viewing This Message
      • well now, ummm ....., Urby, Wed, 27 Apr 2005 07:34:51
        • Thanks, Urby...I welcome YOU to the BB too! :)..., Julia, Wed, 27 Apr 2005 08:17:34
  • Re: Check Engine Light and Poor Performance, Yaofeng, Tue, 26 Apr 2005 19:46:50
  • Some Ideas, Geza in CA, Tue, 26 Apr 2005 18:23:28
    • Thanks and Clarification, Julia, Wed, 27 Apr 2005 02:16:28
  • Get a new mechanic..., AMG , Tue, 26 Apr 2005 17:32:22
    • Re: Get a new mechanic..., Julia, Tue, 26 Apr 2005 17:53:51
  • This one requires to dirty your hands big time for a, Saabello, Tue, 26 Apr 2005 17:02:23
    • Re: This one requires to dirty your hands big time for a, Julia, Tue, 26 Apr 2005 17:16:48
      • Ok, I think you've got two issues here..., turrbo , Tue, 26 Apr 2005 18:31:02
        • TO TURRBO..., Julia, Wed, 27 Apr 2005 05:13:18
        • Re: Ok, I think you've got two issues here..., Julia, Wed, 27 Apr 2005 02:35:32
        • Re: Ok, I think you've got two issues here..., Sam(Merc Mechanic), Wed, 27 Apr 2005 01:45:44
          • Re: Ok, I think you've got two issues here..., Julia, Wed, 27 Apr 2005 02:37:52
            • P.S. Re: Europarts..., Julia, Wed, 27 Apr 2005 04:12:04
              • Re: P.S. Re: Europarts..., Sam(Merc Mechanic), Wed, 27 Apr 2005 05:39:30
                • Thank you, Sam...and..., Julia, Wed, 27 Apr 2005 06:17:12
              • Can I replace a DI Cassette myself?, Julia, Wed, 27 Apr 2005 04:14:40
                • Yes, and as for eEuroparts..., Noel, Wed, 27 Apr 2005 05:47:26
                  • Noel, thanks for a really great post...and..., Julia, Wed, 27 Apr 2005 06:27:11
                    • You're not a "maiden in distress." You are simply, Noel, Wed, 27 Apr 2005 07:24:15
                  • Re: Yes, and as for eEuroparts..., Urby, Wed, 27 Apr 2005 06:01:34
                    • Understand. Guess I did both..gave the link and, Noel, Wed, 27 Apr 2005 07:03:27
                      • I think I'll give the nod to the D.I. Cassette..., Julia, Wed, 27 Apr 2005 08:20:59
                        • Re: I think I'll give the nod to the D.I. Cassette..., Noel, Wed, 27 Apr 2005 10:41:47
                        • Here's the flash codes..., turrbo , Wed, 27 Apr 2005 09:42:19
                          • Thanks a million, guys..., Julia, Wed, 27 Apr 2005 13:31:58
                            • Guys, check this out re: DI cassette...sounds scary!, Julia, Wed, 27 Apr 2005 13:40:43
                              • If the DI Cassette impacts the catalytic converter..., Julia, Wed, 27 Apr 2005 13:59:17

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