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Throttle body reset - 2005 Nissan Almera 1.5i

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Throttle Position Sensor


I just finished fixing my 2005 Envoy with the same problem. Your problem is most likely a dirty throttle body. If you take it to a shop they are going to want to replace it for about $500. If you clean it, you can usually fix it for less than 10. There are a couple of good videos on youtube about removing and cleaning the throttle body. Some say not to touch the butterfly inside, but you can also pull the fuses for the fuel system, or do an idle relearn procedure after you clean the throttle body so the vehicle will run properly. Basically, you can clean the throttle body with throttle body cleaner after removing the unit from the intake manifold. You will need a flat-head screw driver, a 10 mm socket with an extension to remove the vortec cover/box that covers most of the engine. There is a wire attached to the left rear corner of the box and an evap hose attached to the front left corner of the box. Then you remove the plug on the throttle body, the fuel line and four mounting bolts and the throttle body comes off. Don't use anything abrasive to clean the part--just throttle body cleaner. Also Don't drop the part. These seem to be rather delicate and using abrasives or dropping the unit will damage the coating on the inside of the throttle body. I do recommend watching the videos.

After cleaning the unit, you may need to do a throttle relearn procedure for the system to reset. look these instructions up online or call a GM dealer. You may also need to clear fault codes while driving the vehicle for the relearn procedure. It took about 20-25 minutes to remove and clean the throttle body, about 15 to reinstall it, and then 200 miles to reset the OBDII codes on the computer. My vehicle also has a faulty fuel guage wich made completing the OBD tests take longer than usual. The repair is pretty straight forward--by no means worth over $500 at a garage!!

Good luck, I hope this helps


May 09, 2014 | 2002 GMC Envoy

1 Answer

Car won't accelerate


On your dash it says REDUCED ENGINE POWER. Clean your throttle body and reset codes. If codes clear you should be fine if not wiggle and pull on wires at connector for throttle body. The grey one is known to break in the pigtail. Resolder and reset light. A dirty throttle body causes lots of problems

Nov 16, 2013 | 2003 GMC Envoy

1 Answer

04 trailblazer staling out


The throttle body needs to be cleaned, grime in this area prevents the throttle plate from closing completely and allowing air to enter, making the air/fuel mixture lean. Make sure to clean the front and back sides of the throttle body. Also, disconnect the battery during the cleaning process to allow the computer to reset and relearn to the cleaned throttle body.

Nov 10, 2012 | 2004 Chevrolet TrailBlazer

1 Answer

Runs good until i turn air condition


The throttle body needs to be cleaned, grime in this area prevents the throttle plate from closing completely and allowing air to enter, making the air/fuel mixture lean. Make sure to clean the front and back sides of the throttle body. Also, disconnect the battery during the cleaning process to allow the computer to reset and relearn to the cleaned throttle body.

Jul 07, 2012 | 2004 Chevrolet TrailBlazer

1 Answer

2001 malibu throtte sticks,


The throttle body needs cleaned its gumed up.Take throttle body off and spray and wipe the inside of the throttle body with a can of throttle body cleaner this should free it up.If that didn't help then you need a throttle position sensor.Reset the computer after any sensor is changed.

Jan 23, 2012 | 2001 Chevrolet Malibu

1 Answer

2003 envoy changed battery out and now when i put on ac truck stalls and dies


The throttle body needs to be cleaned, grime in this area prevents the throttle plate from closing completely and allowing air to enter, making the air/fuel mixture lean. Make sure to clean the front and back sides of the throttle body. Also, disconnect the battery during the cleaning process to allow the computer to reset and relearn to the cleaned throttle body.
When you changed the battery, the computer was reset back to factory settings and with a dirty throttle, the fuel/air mixture is incorrect.

Aug 10, 2011 | 2003 GMC Envoy

1 Answer

The reduced engine power light has been coming on in my 2003 Envoy


1st things first, clean your throttle body with throttle body cleaner. Clean it with the battery disconnected. When finished, drive around for 5 or so miles to reset the computer. The butterfly in throttle body is probably sticking. The throttle body must be nice and shiny when finished.

Jan 12, 2011 | 2003 GMC Envoy

1 Answer

My idle is running as high as 3000 rpm while driving. When stopped it sometimes comes back to normal. I suspect idle control valve????


It could also be carbon build up on the throttle body, but regardless the cure is the same. Your going to need to clean the throttle body and the idle air control valve (IAC). With a can of throttle body cleaner, (follow instruction on the can) clean the throttle body blade and the IAC passage way in the throttle body. Once the throttle body is cleaned, with the engine off, turn the ignition key to the on position (engine not running) and wait for 30 seconds and then turn if off for 10 seconds and then start it. This should reset the IAC, if it did not work do it again and see if it helps. If not clean out the IAC passage way again. The turning on and off the ignition reset's the IAC and it may still be stuck with carbon build up. Once the engine has started, Note there will be lots of smoke form the tail pipe, that's normal. It's just the left over throttle body cleaner and carbon being burn off, take's not more then 10 min to burn off. Good luck and this should keep you from replacing the IAC. Oh and don't use Carb cleaner, Carb cleaner is to corrosive to the throttle body gasket.

Nov 03, 2009 | 2001 Oldsmobile Silhouette

1 Answer

Idling to high when driving.


reset computer if you replaced throttle body you still need to reset comp cause it holds the old properties of old throttle body

Jun 14, 2008 | 1998 Volkswagen Golf

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