Check engine light stays on my 2005 Mecury Sable GS

Look at the automatic Idle control module first then the engine control module.

fix what the codes says is wrong, cancel the light with a scanner

okay, this is a 2005 trail blazer with code co063.
i am sorry but the code is no good, co063 or c0063
try to rescan the code or go to an auto part store like an auto zone and they will scan for free otherwise with out a good scan tool the codes are generic and lots of times the codes wont cross to a good code.

disconnect the battery for one hr.reconnect,if it still not ok,go to auto zone.they will tell you and give you printout of your problem.do not waste any more of your time.

TAKE VECHICLE TO AUTO ZONE OR ADVANCE AUTO PARTS THEY WILL CODE SCAN YOUR VECHICLE FREE.SERVICE ENGINE SOON LIGHT COMING ON COULD MEAN EVAPORATIVE LEAK OR CYLINDER MISFIRE.BUT AUTO ZONE WILL SCAN IT AND TELL YOU WHAT TROUBLE CODE YOU ARE GETTING.

No, you can't.obd2 requires a code reader to read the codes and you can't use the check engine light anymore.It is usually cheaper to buy one at walmart then to get someone to hook theirs up,check your options,you might want to buy one.

oil check oil. when light on dash comes on that means your jeep has a code for ya. take to auto zone and they will read the code for free with a code reader.

You can take your car to Auto Zone and they will scan the codes for FREE. They will also let you know the part causing the problem. 99% of the time it's a sensor that you may be able to replace yourself if your handy with cars. Without the codes, it's random guessing to fix the problem.

You has a vacuum leak on the engine.

In order to troubleshoot this, you must start with a clean engine wipe down.


The major offender parts are


air intake gasket on the manifold

air tube after the mass air flow sensor

rubber seal under idle air control IAC motor

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Warm up the engine for 15-20 minutes (LEAVE THE engine at idle) then spray a little Barmen carburetor clear on the potential air leak location (ONE AT A TIME) and listen for a surge in rpm.

If the engine speed go higher that's mean the carburetor clean (ADDITIONAL FUEL) got into your engine and that's the gasket you need to change.

There may be multiple leaky spots so take your time and check all rubber gaskets,sensor and hose that are lead into the intake manifold.

When you finish fill up with one tank of Chervon to clean out the injectors.

Please post more information after your inspection.

without a fault code its impossible to diagnose. try pep boys or aamco or auto zone they will pull the code for you, usually for free. The code will relate to a sensor or area to be fixed. This will save you money and needless parts . post the code or codes so we can help