Question about 2004 Hyundai Santa Fe
GOT A PO446 CODE READ WHEN ENGINE CHECK LIGHT CAME ON
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: MY CAR IS A HYUNDAI
your post is fairly vague...
a P0446 can be caused by many things including but not limited to a defective gas cap
to diagnose you need a factory scanner and a "smoke machine"
with these two you can control the system and fill it with smoke to find the source of the leak
the reasoning for this testing method is because the size of the hole you are looking for in the EVAP system is about the size of a pin tip
as for the air bag... do not mess with it...seek professional assistance because static electricity can deploy the bags
Posted on Sep 13, 2010
SOURCE: my check engine light came
Some ck engine lights come on after 100,000 miles or so. When you take it to the shop they ck engine and reset the engine light indicator. Just a safety feature.
Posted on Sep 13, 2010
Testimonial: "Thanks fofr the quick response. I feel a lot less concerned about taking my car in."
OK To start with, you need to forget about the air conditioner until you get your engine running correctly. The HVAC is controlled by the Powertrain Control Module (PCM). The PCM is probably not allowing the HVAC to run due to all the engine misfire codes you are getting. It may be someting else, but until you get your engine running right, you could be spinning your wheels.
I have no clue what you are talking about when you say "Ignition Sensor" - there is no such sensor on any vehicle that I am aware of. There are many sensors that can affect the ignition like the Crankshaft Position Sensor, but none are called "Ignition Sensor".
P0300 Simply means that there is more than one cylinder misfiring.
P0301 means that cylinder #1 is misfiring, P0302 means that cylinder #2 is misfiring, P0303 means that cylinder #3 is misfiring, and P0304 means that cylinder # 4 is misfiring. (these are what are known as "current faults". The codes ending in "P" mean the same thing, but they are "pending" codes. Current faults MUST be dealt with FIRST.
The P0446 is not a valid code for a 2003-2005 Hyundai Santa Fe as far as I can tell. I tried to look the code up by application and it simply is not there. You may want to read the code again. Sometimes, if you are reading the codes with a "generic" OBD code reader, it will give the closest description it can for a "Vehicle-Specific" code. They are not allways correct. You may want to scan your computer with a scanner that is equipped with the Vehicle-Specific software for your vehicle. You will probably get a different rendering of the code.
The "generic" description of P0446 is "Evaporative Emmission Control System Vent Control Circuit" Again, the DTC list for your vehicle lists similar codes: P0445, P0447 and P0448, however it skips over the P0446 code. If you in fact have a problem with your EVAP vent solenoid circuit, it could, concievably be the cause of your misfire problem. It is possible that the vent solenoid is causing a huge vacuum leak. NOT LIKELY that it is causing the misfire codes, but POSSIBLE.
Anyway, there are literally HUNDREDS of parts that can be the cause of a misfire. This needs to be PROPERLY DIAGNOSED to determine the cause. It could be anything from worn-out spark plugs, a vacuum leak, a faulty fuel pump, all the way to a blown head gasket or cracked cylinder head. Whatever the actual cause may be, it is obviously affecting all 4 cylinders. (This will rule out some things).
Please also review this article:
What Else Could Be Wrong?
Posted on Jun 21, 2011
Tips for a great answer:
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Evaporative Control 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.
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