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Extreme cold and altitude effect on Acura MDX oxygen sensor

I am at 6700 feet and in 3 to 25 degree temp actuaries and the check engine lite went on. Is this just due to extreme cold and altitude.

Posted by Anonymous on

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SOURCE: 2000 toyota tundra has no throttle response during extreme cold

This throttle body has a TPS ( throttle position sensor) and a Accelerator pedal sensor on it. The TPS is on the drivers side and the APS is on the pass side of the throttle body. When this happened your check engine lite came on then went off when it warmed up and acted normally. The code is still in History codes. Check it with a scan tool. I foget the code number but if it come up with the APS code in History, replace that sensor....not the TPS. It is a sealed sensor that gets moisture in it when the seal deteriates and it freezes in very cold weather.

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SOURCE: I have a 2002 Acura MDX with a check engine light

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Check the fuel system, the pump and the fuel pressure regulator or Mass Air Flow Sensor. Evaporated emissions are the fumes that your fuel gives off. The pollution control system pulls them back into the intake to burn them off when you are running your engine. There is a vacuum line that is leaking between the fuel tank and the sensor that detects this or your gas cap is loose or leaking. It could also be a bad sensor which detects vacuum pressures from the tank. If everything has been check, then check inside the throttle by pulling off your Air pressure Intake then open the throttle by using screwdriver or any tools than can push in one the fuel control line to open, which is attach on the left side of the throttle. and if you look straight inside, you will see three hole. Then look by the bottom and you will see the two hole cover with black burned Oil. This means your fuel mixer (Throttle) is not pushing out air properly it gets clog , and the only way to get out is when you push the Gas peddle which is the burned gas will come all the way out to the Air Intake and it will circulate to any open area. If I was right about this! Your solution is to buy a Air Intake Cleaner or Carb-Throttle Cleaner. with the engine OFF, spray inside the throttle by using the red straw and point it to clean the two black clog hole. then wait for a about10 minutes or more to dry up cleaner after spraying the inside throttle. When you start the engine, black smoke will come out to the muffler. No worry this is normal to the engine, means the cleaner is burning and working to get out. Without cleaning the throttle body, the engine will soon stall, or stop without any giving warning light, because this means your A.C. Pressure Clutch and Idle Pully barring are NO longer working properly and maybe totally wormed out. You may also change the throttle position sensor. and check all your Gas and Oil Intake Hoses for a leak. hope this will help to solve your problem. P.S. You can also spray the Intake cleaner to your Intake Mass Air Flow Pressure Filter before putting it back to the throttle body.
If you have any more question you can email me at reginestacio@yahoo.com Take care and Good luck.


Posted on Sep 21, 2010

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2000 toyota tundra has no throttle response during extreme cold


This throttle body has a TPS ( throttle position sensor) and a Accelerator pedal sensor on it. The TPS is on the drivers side and the APS is on the pass side of the throttle body. When this happened your check engine lite came on then went off when it warmed up and acted normally. The code is still in History codes. Check it with a scan tool. I foget the code number but if it come up with the APS code in History, replace that sensor....not the TPS. It is a sealed sensor that gets moisture in it when the seal deteriates and it freezes in very cold weather.

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