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10-21-2023, 07:02 AM | #1 |
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Bmw 2013 M135i Fuel issue
Hi, I have some issues with my car, it has now started to use more fuel than it used to. The car is modified and is decatted but there were no problems before. I decided to scan the car and the error I'm getting is this:
12A308 - Oxygen Sensor After Catalytic Converter, Dynamics, From Rich To Lean: Slow Response Can anyone help me on this matter, I have done some research and everyone is saying different things, there is no warning light on the dashboard either as someone said there should be. Any help would be appreciated, thanks in advance. |
10-21-2023, 11:17 AM | #3 |
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Posts Drives: 2009 E93 M3 DCT Join Date: Dec 2017
Location: BC Canada
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10-21-2023, 09:26 PM | #4 |
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A sensor might seem retarded because you are going too fast: say, if your decatted car when going with the headlights on leaves the light they throw behind, that's a tad too fast, you might need to slow down.
More seriously and apparently (a wild guess), the sensor might have degraded because of decatting and you need to replace it, perhaps with a stub. |
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10-22-2023, 10:05 PM | #5 |
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Posts Drives: A Family Sedan Join Date: May 2023
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My guess is that your car is simply in limp mode because of the absence of cats.
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