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DIY: Do It Yourself
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Old 07-09-2014, 08:16 AM   #1
stupot
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Join Date: Mar 2014
Location: Reading, UK
Posts: 12
My Ride: 2004 E46 318ci
Cannot translate fault codes from generic reader

Ive had a few fault codes on my 2004 318 on and off for a little while and decided it was time to sort them out. I borrowed a friends reader and had four faults. I noted them down, cleared them and then waited a few days and ran the diagnostic again. This time I had three faults:

u1030
u1062
u1064

I did look on the sticky here but no luck - all my codes aren't listed (I should perhaps mention the reader was generic - not bmw) After various bits of googling ive come up with a diagnosis for my emissions and EML light (I think)

u1030 - Pre-cat lambda is faulty.

Can anybody confirm this before I waste money? The second two codes seem to be relating to the AC. The AC runs fine and hasn't had any issues in the time ive owned the car, but perhaps the gas is low? Can anyone shed any light on this?

Cheers all.
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Old 07-10-2014, 08:44 AM   #2
markusmarkus
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Location: USA
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My Ride: 2001 330Ci
Did you try google? If find another code reader.


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Old 07-10-2014, 01:45 PM   #3
stupot
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As i said in my OP i did some googling but like i say, wanted clarification
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Old 07-11-2014, 08:45 AM   #4
markusmarkus
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The "fault" seems to indicate that the pre-cat O2 sensor has a problem. Please remember that the problem could be caused by things such as a bad vacuum leak or a faulty injector. I'd find someone with a different reader.


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Old 07-11-2014, 12:36 PM   #5
stupot
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My Ride: 2004 E46 318ci
Anybody know if a dodgy fuel pump could cause that warning? Im guessing not but not sure...
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Old 07-12-2014, 06:44 AM   #6
markusmarkus
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How dies the car run? Does it seem to lack power? How many miles on the clock?


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Old 07-15-2014, 05:26 PM   #7
stupot
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The car runs mostly fine. Occasionally the revs are a bit up and down in traffic as if its getting a bit of starvation. Otherwise it generally seems to run fine other than being throttled by the warning light. Mileage around 69k.
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