Odd O2 Behavior
Fellas,
Question about my 1995 M3. I'm getting a weird Check Engine light coming on intermittently. To start, the car runs great, strong without issue. Occasionally, usually when sitting at a stoplight, the idle will drop from a nice ~800rpm down to ~300rpm, stutter, then completely go back to normal. This throws a Check Engine light.
I read the code from my Peake and I get: FF C9 0D: o2 sensor.
This isn't super surprising, as the car has 170,000 miles and this is the original. So I replaced the 02 sensor... and the issue persists.
Before I go throwing a bunch of parts at this issue, does anyone have any obvious things I should check?
Thanks,
E
Evan Ruff, Engineer, Atlanta GA
1964 Cadillac Coupe De Ville
1970 Ford F100 Ranger XLT
1972 BMW 3.0CS, converted to 3.5L w/L Jet
1978 Ferrari 308GTB
1985 BMW M635CSi
1995 BMW M3
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