Two problems related to check engine light on have been reported for the 2011 Smart Fortwo. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Smart Fortwo based on all problems reported for the 2011 Fortwo.
2011 Smart Fortwo coupe. Running rough and showing check engine light with obd code p0302. Mercedes-benz dealership found misfire on cylinder #2. Further investigation found cylinder #2 leaking 75%. Removed and replaced cylinder head with a new cylinder head as a "goodwill repair. " this particular mercedes-benz dealer has done 14 of these repairs to date. This appears to be a problem with a number of the Mitsubishi engines used in the current model Smart Fortwo.
Engine check light came on. No apparent reason. Car drove ok brought to mb dealer. They run diagnostic. Noted that cylinder 3 misfired at some point, but everything is fine now. Car was in warranty then. After several months check engine light came on again. Car was riding rough temporarily. Then it was ok and the light went off. Light came on again around 35000 miles. Brought to dealer again. Car was driving fine at that point. There was some occasional hesitation in shifting. Was informed that cylinder 3 was not seated properly and misfiring. I would need a cylinder head replaced costing about $7000. At this point warranty expired. After the check was performed the car was in worst condition and could not be driven.
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