Question about 2005 Mercury Mountaineer AWD

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2005 Mountaineer - Auto shop said I need IAC replaced?

The mechanic shop said the engine code came back to IAC needed to be replaced. Another mechanic told me you can't replace just an IAC on the 2005 .... so what is the real deal? Is it really more than just replacing an IAC module??

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  • Lori Feb 26, 2012

    Took the vehicle to Ford, they replaced the throttle body. Problem solved. :)

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5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

csmock132
  • 4669 Answers

SOURCE: I have a 2003 mercury mountaineer with 71,000

Have it rescanned and see if it is the same code. What engine do you have?

Posted on May 19, 2009

dkeven
  • 62 Answers

SOURCE: need to replace my dpfe sensor on my 1999 mercury mountaineer. Where is it, i would like to change it myself

the sensor is on the rear of your engine next to the firewall on the 5.0 looking at the egr valve just to the right of it, has two small bolts holding it on and holding the stamped steel bracket for its up against

Posted on Jun 04, 2009

  • 51 Answers

SOURCE: locating and replacing a camshaft sensor in a 2005 dodge neon

this is a very very simple procedure. you do not need pics. there is a sensor located at the end of the engine on the far side from the belts. at the top. it has a plug with two wires in it. just remove the two 10mm bolts un hook the plug and reverse the process to reinstall. if you have a factory intake you may have to remove it to access this sensor. just the intake tube.

Posted on Aug 08, 2009

  • 5501 Answers

SOURCE: 2005 Mercury Mountaineer rear end whine, how hard to fix

Before you do this you might want to try fresh gear lube. On Ford products they use a synthetic additive in the rear and not in the front 4x4 axle.
The next thing would be to determine if it is a wheel bearing or a pinion bearing. You have to pull the axles and eliminate them as the problem. You might get lucky and not need to do the pinion.
The technical part of shimming the pinion gears with replacing the pinion bearing is about the worst part of the job. You won't know about the gears until you see them. You will need extra shims on hand.
It is a moderate job for two people. If you have all the parts it can be done in a day.

Posted on Aug 23, 2009

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1 Answer

I have a 2003 mercury mountaineer with over 1000,000 miles on it. Last night the O/D light came on flashing and the service engine light came on steady. It doesn't want to shift from a low gear into


Hi there William, your problem could be that the auto rquires servicing if there is a dipstick for the auto oil check the colour of it, if not red/pink. Maybe low on trans fluid. Auto parts shop for correct fluid.May require auto shop for code scan as well.

Nov 29, 2014 | 2002 Mercury Mountaineer

1 Answer

2005 Mountaineer V6 engine shakes at idle but is fine when driving. Not getting any trouble codes, what would cause this?


The most common problem for that is carbon (dark black color) build-up in the throttle body. It is an inexpensive fix and only takes about 10 minutes. It is also a good starting point if the check engine light is not on. Locate the air filter box in the engine compartment. There is a large hose that runs from the box to the motor. The other end is connected to the throttle body. It needs to be removed from the throttle body to gain access to the throttle body throat. With the engine OFF, using a can of carb and choke cleaner and spray the inlet of the body and wipe clean with a clean shop towel. You can manually open the plate to gain access to all areas of the throat and both sides of the plate. All of it needs to br thoroughly cleaned. Once all the carbon is removed, put the hose back on and test out the idle.

Oct 07, 2012 | 2004 Mercury Mountaineer

1 Answer

Overdrive light and engine light comes on


Over drive light being on is fine, check engine light being on you need to take it to a an advanced auto and have them put the OBD2 reader on it to see what codes it's giving, or take it to a shop and pay to have the code read then fixed just trying to safe you money.

Jan 28, 2011 | 2004 Mercury Mountaineer

1 Answer

06 mountaineer check engine light on. had codes read. saying EVAP system leak detected, already replaced fuel cap. what to do next?


First, disconnect the battery for 10 minutes or go back to Auto place and have them erase the code from the computer.

If the code reappears after that, you need to go to a Auto service place that has a machine called a "smoker". It is the only way to find leaks in the fuel vent system.

Apr 16, 2010 | 2006 Mercury Mountaineer

2 Answers

Service Engine soon light on 2001 Mercury mountaineer went on yesterday call hass 77,3000 miles


Your vehicle either requires maintenance or has suffered a failure...either way you need to take it to a shop.

Feb 03, 2010 | 2001 Mercury Mountaineer

1 Answer

Intake air duct leak


All of those codes will come up as probable cause. The hand helds that auto stores use are not accurate. You need a certified mechanic with a Genesis , Snap On or a Mac scanner or the dealership. The actual problem could be causing any of these codes.

Sep 28, 2009 | 2005 Suzuki Forenza

2 Answers

2005 Mercury Mountaineer rear end whine, how hard to fix


Before you do this you might want to try fresh gear lube. On Ford products they use a synthetic additive in the rear and not in the front 4x4 axle.
The next thing would be to determine if it is a wheel bearing or a pinion bearing. You have to pull the axles and eliminate them as the problem. You might get lucky and not need to do the pinion.
The technical part of shimming the pinion gears with replacing the pinion bearing is about the worst part of the job. You won't know about the gears until you see them. You will need extra shims on hand.
It is a moderate job for two people. If you have all the parts it can be done in a day.

Aug 21, 2009 | 2005 Mercury Mountaineer

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