check engine problem

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Jul 1, 2008 | 01:33 PM

ficohummer

Thread Starter

Joined: Jul 2008

Posts: 1

check engine problem

I HAVE A LIGHT ON ENGINE AND THE CODE IS P0303 MISFIRE CYLINDER 3, HOW FIX THIS PROBLEM

Jul 1, 2008 | 01:42 PM

Doc Olds

Super Moderator

Joined: Jul 2007

Posts: 13,083

From: Boat Town USA MI

RE: check engine problem

Let the dealer look at it.

Jul 1, 2008 | 01:55 PM

Bitdriver

Joined: Jun 2008

Posts: 75

From:

RE: check engine problem

Yeah definately a dealer issue unless you're a full blown mechanic. Try clearing the trouble code, see if it happens again. If it does, take it to the grease monkey.

Jul 2, 2008 | 11:37 PM

h3carlos

Senior Member

Joined: Oct 2006

Posts: 135

From:

RE: check engine problem

Have you had an onstar diag?

Jul 3, 2008 | 12:03 AM

Mr_Pat

Joined: May 2007

Posts: 117

From:

RE: check engine problem

Is yours an 06 H3???? Maybe a bad head.

Jul 3, 2008 | 03:35 PM

blaine517

Joined: Mar 2008

Posts: 37

From:

RE: check engine problem

I know the early year colorados had a head issue. But was fixed by late 05 early 06. i would suggest taking it into a dealer and hae them fix it.

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