Check engine P2098?????
09-12-2015, 01:32 AM
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2014 E63 AMS Alpha9
Check engine P2098?????
Does anyone have an idea what could be causing this? My car always passed emissions, now it won't. Check engine light comes on after 30 miles. Runs and idles fine. Service tech said light is triggered on de-acceleration. A smoke test was performed up front with no vacuum leaks found. Plugs were changed two months ago. Fuel pump and sender replaced about two years ago. I tried researching this on the forum with success. Your help greatly appreciated!
09-13-2015, 09:41 PM
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'06 E55
Mine has had these codes since I started modifying my car about three and a half years ago. Mine also does it on decel. I watch my DashDAQ to see what causes it and it happens when coasting/off the pedal for several seconds. The short term fuel trims will jump from 0% to around 17% after several seconds of coasting. Once on the gas again, they jump back down to normal range, but that brief time is enough to trigger the "lean condition" code.
09-13-2015, 10:10 PM
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2014 E63 AMS Alpha9
Mine has had these codes since I started modifying my car about three and a half years ago. Mine also does it on decel. I watch my DashDAQ to see what causes it and it happens when coasting/off the pedal for several seconds. The short term fuel trims will jump from 0% to around 17% after several seconds of coasting. Once on the gas again, they jump back down to normal range, but that brief time is enough to trigger the "lean condition" code.
