Question about 2008 Chevrolet Aveo

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Have a 2008 Chevy Aveo. The check engine light is on w/a po420 code. The dealer shpwed me a TSB that stated that this is a problem w/the catalytic converter but first have to replace all 4 injectors. Does this sound right with no syptoms? they even did not test the injectors?

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TSB are technican sevice buliton
since this is an emmission problem for both catalitic and injectors
it should be covered under emmission warranty (check to be sure)
injectors could be overfuelling causing catalitic to malfunction setting off codes
or pluging up with carbon

Posted on Apr 03, 2011

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Posted on Jan 02, 2017

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that is the code for the catalytic convertor. it is either bad or not working at optimal levels. In most cases this in not such a big deal unless you live in a state that does emission testing buy pug in and not tail pipe emissions. Most states now use a quick OBD II plug-in test to check emissions compliance on 1996 and newer vehicles. The plug-in test is faster, easier and cheaper to do than a loaded mode tailpipe emissions test on a road simulator or dynamo-meter. The rules in most states say to pass the OBD II plug-in test, the vehicle (1) must have a fully-functional OBD II system (Check Engine lamp works and the diagnostic connector communicated with the engine computer), that the Check Engine light must be off and that there are no current codes in the computer's memory. If this is the case than you're going to have to replace the converter.

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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
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