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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Mon, Oct-14-2019, 05:24:28 PM   #1
JitteryJoe
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Default Recurring error codes

I keep getting these error codes. The O2 sensor is new as is the throttle sensor. It happens after about an hour of driving. Any thoughts here? It only happens for cyl. bank 1-3. It pretty consistently happens. My usual driving route takes me from sea level up into the mountains (about 3000 ft). Not sure if O2 density at this altitude would have any impact.

I can go in and replace the O2 sensor again. Any other areas I should check?

// 1) C8 PreCat 02 sensor no activity, Cyl #1-3
// 2) E3 02 sensor adaption limit, Cyl #1-3
// 3) 0C Throttle position sensor
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Old Mon, Oct-14-2019, 06:50:54 PM   #2
Braymond141
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Default Re: Recurring error codes

Check that your ECU connector is fully seated into the ECU. It's not enough to just latch it. You have to latch it and then push it into place.

E3 is likely tied to the C8 issue. E3 by itself is typically a tune problem. You'll need to get an INPA setup to start monitoring data. You can also buy Quickflash. It's an ECU flashing program but it also has live data and logging, in addition to adaption reset and code read/reset. A Windows PC and a $20 INPA cable is necessary in addition to the software. https://sites.google.com/site/openms...s41-flash-tool

0C you need to get out the multimeter and ohm check it. Resistance check the sensor with the throttle closed and then WOT. Resistance check with the connector attached what the values are at the ECU connector as well.
https://www.bimmerforums.com/forum/s...re-Code-0C-FIX
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Old Mon, Oct-14-2019, 07:10:32 PM   #3
JitteryJoe
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Default Re: Recurring error codes

Quote:
Originally Posted by Braymond141 View Post
Check that your ECU connector is fully seated into the ECU. It's not enough to just latch it. You have to latch it and then push it into place.

E3 is likely tied to the C8 issue. E3 by itself is typically a tune problem. You'll need to get an INPA setup to start monitoring data. You can also buy Quickflash. It's an ECU flashing program but it also has live data and logging, in addition to adaption reset and code read/reset. A Windows PC and a $20 INPA cable is necessary in addition to the software. https://sites.google.com/site/openms...s41-flash-tool

0C you need to get out the multimeter and ohm check it. Resistance check the sensor with the throttle closed and then WOT. Resistance check with the connector attached what the values are at the ECU connector as well.
https://www.bimmerforums.com/forum/s...re-Code-0C-FIX
Thanks Brett. You've given me some areas to follow up on. Appreciate it.
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Old Mon, Nov-25-2019, 02:34:32 AM   #4
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Default Re: Recurring error codes

Would elevation change cause O2 errors to fire? The errors occurred when driving from sea level to 3000 ft. and back to sea level. Is that enough of an air density change to cause an error? Driving up to the mountain pass seems to always fire an error. I was out driving around today without any elevation changes and no error fired.

Thoughts? Thanks!
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Discussing Recurring error codes in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)