Question about 2001 Ford Taurus
Will not pass smog...Do not have a book on it and a fuse is missing
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Posted on Jan 02, 2017
Here is a list of possible causes, hope this helps.
Your vehicle’s computer system has self-testing capability. When the computer senses that there is a problem with one of the components or sensors it stores the correspondent trouble code(s) in its memory and lights up the "Check Engine" or "Service Engine Soon" light to tell you that there is a problem and you need to diagnosed and repaired it. The list of possible codes number in the hundreds. The code itself doesn't tell exactly what component is defective - it only indicates where to look, or what engine parameter is out of normal range. You or a technician will have to perform further testing to pinpoint cause and the proper repair. Even if you reset the light, if the underlying problem is not addressed it will come back on.
Possible Causes Setting Conditions
Posted on Mar 10, 2009
YOU CANT TURN OFF PCM WHEN IT SPOT A PROBLEM.YOU HAVE TO FIX PROBLEM.BECAUSE THE CHECK ENGINE WILL STAY ON UNTIL PROBLEM FIX. ITS AGAINST THE LAW TO TAMPER WITH EMISSIONS SYSTEM.BECAUSE OF SMOG AND POLLUTION LAWS..HAVE TRUCK SCAN TO SEE WHAT YOUR PCM CODE IS.COULD BE SOMETHING MINOR.
Posted on Sep 30, 2009
Your P0446 code is a Evap vent valve code: Evap vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks. Evap vent valve is usually supplied Batt. voltage with key on. The ECM's driver controls the ground, and when grounded, activates the valve (closing it). If the ECM detects a short to ground, and open,or a short to battery voltage on the control circuit, P0446 will set. Code also may refer to ECM detecting that EVAP system is unable to achieve or maintain vacuum during test.
Symptoms There will be no obvious symptoms to driver, other than MIL illumination.
Causes A code P0446 could mean one or more of the following has happened:
Posted on Nov 20, 2009
If the engine has a P0305 DTC (Data Trouble Code) for a "cylinder 5 mis-fire detected", then the first thing to do is to do a compression test to determine if the mis-fire is actually being caused by a mechanical problem, or an electronic problem.
If the engine really does have low compression on the #5 cylinder then that is caused by a mechanical mis-fire and nothing electronic will repair it, and the most common causes for a mechanical mis-fire would be a burnt or bent intake or exhaust valve, a warped cylinder head or damaged head gasket, or a damaged piston. You can call around and find a repair shop that will do a "compression leak down test" if you want to know exactly what is causing the compression leak without any dis-assembly to the engine.
Posted on Jun 08, 2010
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