check engine light is on

mikey674
0

Asked by mikey674 Oct 26, 2008 at 03:02 PM about the 2004 Chevrolet TrailBlazer LS

Question type: General

i had filled my tank with fuel then after driving fo a while my check engine light came on. I took the car to where i had bought it and told me the light came on because i did not tighten the gas cap enought.  Does this make any sence

5 Answers

Adam Morgan
4,235

Yes, if you cap is not tight it will through a code. retighten the cap and the light should go off if not, get the code read (not erased) and go back to them with it.

Fen Chen
15

It will set a code for the evap system. Just leave it alnoe, it will automatically turned off and ereased.

1 out of 1 people think this is helpful.
Andrew McGraw
145

Your gas cap probably says "Tighten past 3 clicks." This is exactly why.

3 out of 3 people think this is helpful.
Michael McGrail
5,445

Yep, it triggers an evap leak code!!!

1 out of 1 people think this is helpful.
FrootLoop
30

i'am getting a P0496 code on my 2004 trailbalzer , is this the purge valve, and is located under the engine cover ? Thanks.

3 out of 3 people think this is helpful.

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