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Chevrolet Cobalt Engine Problems

362 TrueDelta members own (or used to own) a 2000 or newer Chevrolet Cobalt. 53 of these members (14.6%) have reported engine repairs for their car. A total of 85 engine repairs to Chevrolet Cobalts--an average of 0.2 per vehicle--have been reported.

See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently Chevrolet Cobalt problems occur, check out our car reliability stats.

Chart based on 350 repairs.

Chevrolet Cobalt engine repair cost distribution

Chart based on 42 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
Non-members can see only ten Chevrolet Cobalt repair histories. Log in or join us to see them all.

2007 Chevrolet Cobalt 4dr Sedan

148-horsepower 2.2L I4 4-speed automatic FWD

27590 mi   Replaced thermostat under warranty. 

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2007 Chevrolet Cobalt 2dr Coupe

148-horsepower 2.2L I4 5-speed manual FWD

10000 mi   Crank Angle Sensor leading to CEL and Tach failure. Crank Angle Sensor resulting in CEL and Tach failure. 

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2006 Chevrolet Cobalt 4dr Sedan

145-horsepower 2.2L I4 4-speed automatic FWD

17000 mi   Oil leak detected at oil change. Scheduled repair and mechanic found head to be leaking and porous. Head replaced with new. 
282000 US $33 Purge Valve for Evap. Cannister system replaced. Total cost $33 for parts. 
300000   Front O2 Oxygen sensor replaced 
303000   Ignition Control Module replaced 
310000   Ignition control module replaced again...part under warranty. 
26040   Engine ceased to function on 2 of its cylinders. Faulty control module. 
10000   Email 2-8-2007: Took car to dealer to try to find a hesitation problem that I have had at stop lights. It just feels like the car misses a beat once and a while. Dealer found nothing wrong. 
17000   I was only getting 25 MPG, should be higher, vehicle running ok. Found two codes P1300 engine misfire detected, P0171, fuel trim lean. Needs injectors cleaned and PCM reprogramed. 

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2005 Chevrolet Cobalt 4dr Sedan

145-horsepower 2.2L I4 5-speed manual FWD

41000 mi US $15 Engine light diagnosed as fuel system problem/lean. Added 64 oz. mineral spirits to full tank of gas. Presently waiting for light to go out(mineral spirits are same as injector cleaner). 
45000   Engine Light went out in April with no further repairs. 
83000   Engine light on. code said O2 sensor. replaced and light stays off. 

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2005 Chevrolet Cobalt 4dr Sedan

145-horsepower 2.2L I4 4-speed automatic FWD

59000 mi US $85 Check engine light was on they said it was due to the knock sensor needing to be reprogrammed and the "evap vent solenoid" needed to be replaced. I have not noticed any change in mileage or performance so I decided to not pay the $300+ they quoted me ... 

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2005 Chevrolet Cobalt 2dr Coupe

145-horsepower 2.2L I4 5-speed manual FWD

103000 mi US $247 Car wouldnt start one morning. Took off the coils and removed the boots and saw that cylinders 2 and 3 werent firing. Replaced the coil packs and the ignition control module and its been riding smooth since. 
207000   Rocker disintegrated, shoved intake valve open, crashed into piston, rod fell apart, bent oil pickup in oil pan. Replaced rocker and entire bottom end. 

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