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Camina
Joined: 03 May 2004 Posts: 99 Location: Boston, MA
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Posted: Fri Jun 07, 2013 1:34 am Post subject: Check Engine Light is On |
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I have a 1988 325 and I smashed the oil pan while driving over the island/curb taking an exit on the highway too late. I had to get towed to my mechanic who replaced it. When I picked up the car the Check Engine Light was on. It wasn't before. The mechanic said it's probably the O/2 sensor. I made another appointment and had it replaced but the Check Engine Light was still on. My mechanic said the Fault Code was originally 10 (control) and 13 (0/2 sensor). After replacing the 0/2 sensor the 13 was gone but the 10 was still there. He checked all the wiring and claims the only thing he could find wrong was there was no voltage on one of the lines leading to the car's computer. He said a new computer is expensive and was trying to locate a used one but said the car is running fine and not to worry about it for now. After reading stuff online I see the numbers are 4 digits not 2. So, where is he getting these numbers from and does his diagnosis make sense ? I have my doubts because I'm thinking how could my minor accident cause the computer to become defective. There must be something else wrong ? _________________ 1988 325, "super eta", 300k+ miles |
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85-325e
Joined: 30 Jun 2002 Posts: 4712 Location: Southampton, NY
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Posted: Sat Jun 08, 2013 4:36 pm Post subject: |
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Unfortunately, my car doesn't have the codes, so I've never seen them or used them. However, hopefully, Idanity, Dale, Robert or others will chime in here and tell you what's going on.
If you need a replacement ECU, check eBay. There are always a few for sale up there... _________________ Cosmo - 1985 BMW 325e, Single Owner, 265,000+ ORIGINAL miles and still going strong! But now on the East Coast and the salt air corrosion is eating my beautiful car alive...
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dale
Joined: 22 Aug 1999 Posts: 3087 Location: Seattle, WA USA
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Camina
Joined: 03 May 2004 Posts: 99 Location: Boston, MA
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Posted: Sun Jun 09, 2013 11:50 pm Post subject: |
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I found this.
Early systems (Motronic 1.1 only, I think) flash the fault codes automatically. If the check engine light comes on, leave the key in the On position, but dont start the car. The check engine light will begin to flash the code after about 3 seconds. Each flash is separated by about 1 second. There arent many codes on this system
1 flash......Air flow sensor malfunction.
2 flashes....Oxygen sensor malfunction.
3 flashes....Coolant Temp. malfunction.
4 flashes....Throttle switch malfunction.
More detail on these early systems can be found in the Bentley manuals. _________________ 1988 325, "super eta", 300k+ miles |
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