2006 Chevrolet Cobalt LS 2.2L Poor Idle Quality
thanks in advance guys this colbalt has me stumped it came in for low cat efficancy code checked back pressure 1.5 psi ay 2500 rpm downstream o2 about 550mv scanner data not changed o2 mv lower sent customer home next day shes back code back freeze frame said ...
FIX posted 12/31/2014
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Vehicle Data2006 Chevrolet Cobalt LS
Trouble Codes
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Vehicle Data
2006 Chevrolet Cobalt LS
VIN | 1G1AK15F56 |
Engine | 2.2 L / 4 cyl / GAS |
Trans | 5-speed Standard |
Delivery | Fuel Injection |
Emissions | OBD-II Compliant |
Symptoms | Poor Idle Quality |
Occurs | Always |
Misc. | Fast Idle |
Trouble Codes
P0420 | Catalyst Efficiency Below Threshold (Bank 1) |