Four problems related to check engine light on have been reported for the 2010 Chevrolet Cobalt. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Chevrolet Cobalt based on all problems reported for the 2010 Cobalt.
Tl the contact owns a 2010 Chevrolet Cobalt. The contact stated that after refueling, the vehicle failed to start-up on several occasions. After several attempts the vehicle started but failed to engage when shifted to drive with the check engine warning light illuminated. The contact stated that there was a fuel odor present after the vehicle was refueled. A dealer was not contacted. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to NHTSA. The failure mileage was 36,000.
Vehicle is a 2010 chevy Cobalt 2. 2 ecotech (base model). On start up check engine light appears with message engine power reduced. Check engine code is p0641. Replaced multiple sensors, throttle body, checked for wire issues etc. Dealer replaced ecm and still having issues. Can not drive over 40mph or engine with disable. Car hesitates and bucks while driving in engine reduced mode. Car has 68,789 miles.
While driving on nys I-90, my 2010 Chevrolet Cobalt LS 2010 went into "engine power reduced" and I was not able to drive over 40 mph. I pulled off to the shoulder and waited for about 10 minutes. I started back up, check engine light remained on and car stays in limp mode. The vehicle now idles rough, accelerates slow when at red lights and stop signs and bucks when shifting gears. First at 10 mph (hard buck) than (lighter buck) at 20 mph, and continues lighter through acceleration. Codes that are coming up are p0107 engine (map) barometric pressure circuit - low input, p0452 engine (evaporative emission system pressure system pressure sensor - switch low input, p0532 engine ac pressure sensor a - circuit low, and p0641 engine (sensor reference voltage a) circuit/open. I was able to clear out all codes except for p0641 (permanent). Please help.
While driving my 2010 Chevrolet Cobalt home after leaving work, I was entering onto the thruway when my check engine light activated, my dashboard reader said, "engine power reduced", the car then lost acceleration, started to buck and shake. I quickly pulled to the side of the road and let the car sit for 15 minutes. Upon start up, I put the car into drive, it bucked into gear and I proceeded with caution not doing more than 30-35 mph. I went to advanced auto parts and ran their free obdii diagnostic reader. The code that came back was po641 - engine control module - port #3. The check engine light cleared out after 2 days. The car runs fine now. Very concerned though.