Question about 2006 Chevrolet Cobalt

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Engine light stays on 2006 chevy cobalt 4cyl.

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  • 7 Answers

You have to get the code read. go to any shop or buy a hand held reader to reset/ find the code.

Posted on Sep 01, 2010

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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: check engine light is on

Why my Check Engine/Service Engines Soon light comes on?
The engine computer or PCM/ECM
All modern vehicles have a computer or the ECM (Electronic Control Module) that controls the operation of the vehicle powertrain (the engine and transmission). The main purpose of this is to keep the engine running at top efficiency with the lowest possible emissions. With constantly growing demands for better fuel economy and new strictest emission regulations it's not very easy to achieve. The engine parameters need to be constantly and precisely adjusted according to various conditions such as speed, load, engine temperature, gasoline quality, ambient air temperature, road conditions, etc. That's why today's cars have much more electronics than in early days - there is a large number of various sensors and other electronic devices that help the vehicle computer or ECM to precisely control the engine and transmission operation and monitor emissions.
The vehicle computer system has self-testing capability. When the computer senses that there is a problem with some of the components it stores the correspondent trouble code(s) in its memory and lights up the "Check Engine" or "Service Engine Soon" light to tell you that there is a problem and your car needs to be looked at. To properly diagnose what is wrong, you need to take your car to a mechanic or a dealer. The technician at the dealership or a garage will then hook up the scanner to the car computer and retrieve the stored trouble code(s). Then he (she) will look it up in the service manual provided by a car manufacturer. The service manual contains the list of possible codes (about few hundreds) and describes what each code means and what needs to be tested. The code itself doesn't tell exactly what component is defective - it only indicates where to look, what engine parameter is out of normal range. The technician will have to perform further testing to pinpoint a defective part.

Posted on Oct 28, 2009

  • 1565 Answers

SOURCE: 2006 chevy cobalt(85000 miles) check engine light

http://www.obd-codes.com/p0420

TSB Number: 3316 NHTSA Number: 10017210 TSB Date: n/a Date Added to File: October 27, 2005 Failing Component:Electrical System Summary:Diagnostic trouble code P0420 may set on low mileage vehicles, or shortly after catalytic converter replacement
TSB Number: 3316 NHTSA Number: 10017210 TSB Date: n/a Date Added to File: October 27, 2005 Failing Component:Electrical System Summary:Diagnostic trouble code P0420 may set on low mileage vehicles, or shortly after catalytic converter replacement
there is a service bulletin for this.

http://www-odi.nhtsa.dot.gov/cars/problems/tsb/results.cfm?start=1&SearchType=DrillDown&type=VEHICLE&year=2005&make=CHEVROLET&model=COBALT&vehtype=PC&typenum=1&component_id=0&summary=true

Posted on Aug 02, 2011

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Related Questions:

1 Answer

Engin Light


Take your Cobalt to a mechanic who knows how to retrieve a stored DTC instead of blaming a "blown fuse" for the problem.

Feb 26, 2014 | 2006 Chevrolet Cobalt

1 Answer

2006 chevy cobalt(85000 miles) check engine light comes on and stays on. I am getting the check engine light code p0420. Engine seems to be running smoothly.


http://www.obd-codes.com/p0420

TSB Number: 3316 NHTSA Number: 10017210 TSB Date: n/a Date Added to File: October 27, 2005 Failing Component:Electrical System Summary:Diagnostic trouble code P0420 may set on low mileage vehicles, or shortly after catalytic converter replacement
TSB Number: 3316 NHTSA Number: 10017210 TSB Date: n/a Date Added to File: October 27, 2005 Failing Component:Electrical System Summary:Diagnostic trouble code P0420 may set on low mileage vehicles, or shortly after catalytic converter replacement
there is a service bulletin for this.

http://www-odi.nhtsa.dot.gov/cars/problems/tsb/results.cfm?start=1&SearchType=DrillDown&type=VEHICLE&year=2005&make=CHEVROLET&model=COBALT&vehtype=PC&typenum=1&component_id=0&summary=true

Aug 02, 2011 | 2006 Chevrolet Cobalt

1 Answer

Light will not turn off 2007 chevy cobalt


if your refering to the check engine light the car has detected a error in itsself have code pulled fix error light will go off

Dec 28, 2010 | 2006 Chevrolet Cobalt

1 Answer

Idols rough, engine light on, code said it could be a vacuum hose. Can not find vacuum hose. Where is it located. 2006 chevy cobalt 2.2l


codes cant say anything, and they really cant say theres a hose off. codes only tell what the computer is seeing that it doesnt like.

Dec 06, 2010 | 2006 Chevrolet Cobalt

1 Answer

I have a 2006 chevy cobalt, check engine light came on, car runs fine, how can I read the codes without a scanner, is it possible?


Your local auto parts store will read them for free, give you a print-out (sometimes) and recommend some popular fixes. Try Auto Zone, or call your local parts outlet.

Dec 05, 2010 | 2006 Chevrolet Cobalt

2 Answers

How to set my timing on a 2006 chevy cobalt 2.2


There is no ignition timing to set on these later model cars. The spark is controlled by sensors and the engines computer which will pulse the injectors and ignition coils. What kind of problem are you having?

Nov 08, 2010 | 2006 Chevrolet Cobalt

2 Answers

Check engine light came on and "engine running on reduced power" message is on.


reduced engine power message chevy cobalt 2006,cars sputtering, and when i presses on the gas the car wont move, i can put the pedal to the floor and the rpm's dont bulge

Aug 10, 2010 | 2006 Chevrolet Cobalt

3 Answers

Engine light came on on 06 chevy cobalt erased with scanner but there is again and again


THE CHECK ENGINE LIGHT COMES ON BECAUSE THE CAR RUNS A SYSTEM CHECK AND SOMETHING IS FAILING. UNTIL YOU ADDRESS THE PROBLEM IT WILL KEEP COMING BACK ON( HINT) REPLACE THE GAS CAP IT IS THE MOST COMMON CAUSE

Feb 14, 2010 | 2006 Chevrolet Cobalt

1 Answer

"TC off" light comes on sometimes and stays on


You may have a brake caliper sticking causing the sensor to trigger. This would also partially explain the hard shifting if the E-brake is dragging.

Oct 08, 2009 | 2006 Chevrolet Cobalt

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