Flex fuel vehicles can develop fuel calibration issues resulting in illumination of the Check Engine Light and/or lack of power. This commonly occurs if only short trips are taken after changing fuel type from E85 to gasoline or gasoline to E85. In most cases, the fuel calibrations can be reset for gasoline using a properly equipped scan tool.
Check Engine Light and/or Lack of Power Due ot Flex Fuel Calibration Error on Chevrolet Impala
Average mileage: 47,707 (10,000–100,000)
Exhaust & Emissions affected: 3.5L V6
17 people reported this problem
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Viewing 1 - 7 of 7 problem details
2013 Chevrolet Impala 21,347 mi, Visitor
I've recently had this issue! My car would not go over 25 mph over the interstate due to loss of engine power. The dealer had it over a week and couldn't find a problem. They suggested it was the E85 I had started using. STAY AWAY FROM E85!
NOT FIXED. Computer does not communicate. After using E-85 my check engine light came on and reads loss of power. Help !!
2007 Chevrolet Impala 90,145 mi, Visitor
I have been doing exactly that, was using gasoline. when gas prices spiked to 3.95 a gal i switched to E85, which is much cheaper. then had to get gas again, because I wasn't close to a station with E85. I do drive multiple shorts trips every day.
2015 Chevrolet Impala 18,000 mi, Visitor
Check engine light code0420 after filling up completely with E85/flex fuel.
2010 Chevrolet Impala 100,000 mi, Visitor
My car would actually cut off while on the highway. I would have to pull over and wait about a minute and then restart it. I thought it needed a tune up so I got that done and the mechanic told me about some sensors, the accelerator petal, fuel injectors etc. and he fixed it. I have not had THAT problem since.
2013 Chevrolet Impala 10,000 mi, Visitor
dealer fixed at no charge.
2013 Chevrolet Impala 46,301 mi, Visitor
I filled only half tank with E85 but my fuel gage started to read full after I drove more on it but when I started my car back up it read low fuel then I was on my way to the had station and it began to rise all the way back up to full and I put more E85 to be safe but the next day after driving around my check engine light popped on then the low fuel light then my car turned off from having no gas.