yeahright
Auto Zone locations (and some other parts places I believe) will hook your car up and give you that info for free.
I feel this can't be stressed enough.
Auto Zone locations will hook your car up to the diagnostic scanner and give you that info for free.
Auto Zone locations will hook your car up to the diagnostic scanner and give you that info for free.
Auto Zone locations will hook your car up to the diagnostic scanner and give you that info for free.
[3X for good measure]
Fair Warning
The code does not specify what the problem is. Only which sensor is indicating a problem. You have to use your brain and think it through to figure
out what would cause that particular sensor to give that reading.
For example; it could indicate that you have a misfire on cylinder x. Do you go inside and buy a spark plug or injector? NO. First, ask yourself what
would cause the misfire? A bad injector, plug wire, defective ignition coil, a clogged or dead fuel injector, loss of compression due to a leaky
exhaust valve, leaky head gasket, worn cam lobe, etc.
Lots of people go spend good money to change out parts (cough *oxygen sensor* cough) because the code said there was a problem. It seems to have fixed
the problem because the check engine light went out. In reality, they accidentally cleared the codes by disconnecting the battery during repairs,
which shuts of the check engine light, (for a while). And they still have another problem.
My point is that in most cases the code has no meaning except as a pointer to guide you to the problem area, so you can continue standard
troubleshooting.
As for the rough idle, it may be as simple as a bad injector, or perhaps this:
TSB #030604041 -- POOR ENGINE PERFORMANCE - MISFIRE, ROUGH IDLE, SERVICE ENGINE SOON/CHECK ENGINE LIGHT ILLUMINATED, DIAGNOSTIC TROUBLE CODE
(DTC) P0300 SET. *TT (NHTSA ID #10004377, FEBRUARY 01 2005)
Chevy Technical Service Bulletin #
030604041
The above is a TSB of a part on the 2002 Chevy Blazer. The Most shops wont volunteer the info, or dont know about it. But if you take it to AutoZone,
and get a code P0300, printout the TSB, and take it to the Chevy dealer. If it meets the following conditions, they will fix it free:
Your vehicle is under warranty;
Your service advisor and/or technicians are able to confirm that the problem exists.
[shrugs] Worth looking into anyway, right?
PS
Code P0300 indicates a misfire, but it does not tell you what is causing the misfire.
Diagnostic Code List
other Chevy 2002 TSB's
More about TSB's
Search for vehicle TSB's, Recalls, and complaints
[edit on 1/12/07 by makeitso]