Engine light on 2009 Impala won't go out after replacing emission evaparation system near tank. It went out for about two months but came back on. Also replaced cap. What next?

SOURCE: engine light stays o n my 2006 impala

you may have to reset the engine light. These cars are all computerized. Call the dealership and tell them that you had to replace the gas cap as it was faulty and caused your check engine light to come on. Ask them if they can reset the "computer" or if they can tell you how to do it (if that is possible).

Don't know if that will work, but my dad has been in the car business for over 35 years - I tend to listen to most the things he says......

SOURCE: 2006 Chevy Aveo Check Engine Light coming on and off

It needs a code scanner hooked up to it,to tell you why the light is on and the cause. If there is an autozone near you take it there or
call different auto part stores to find out if they do that.Without getting the code, it's just guessing what the problem is.

SOURCE: 2003 impala is it a temp sensor or cooling fan switch

Maybe your radiator is clogged flush it out.

SOURCE: 06 chevy impala v6 3.9 liter engine. Check engine

there is a large evaporative leak. keep away form ottozoo, they dont have the brain power to actually diagnose a light bulb., their job is to sell parts., if they sell you the wrong parts tough.Take it to a qualified repair shop that does a lot of GM work or the dealer.

SOURCE: My 2006 chevy silverado 1500

The vent valve is bad, replace it. its not closing, therefore its leaking.