Question about 1996 Mercury Grand Marquis

1 Answer

The check engine light came on last night. I stopped by the local parts store, they checked the vehicle with a meter, and it showed the code was P1120. They had no idea what the code was. I did have a raw gas smell the night before, however I had just fueled up, and put it on that.

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert that has over 500 points.

  • Expert
  • 332 Answers

This P1120 code is indicating that you have a problem with the trottle position sensor, thes could cause a rich fuel mixture and raw gas smell

Posted on Oct 09, 2010


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

How to reset engine light on a 2005 f150 5.4 triton

You don't disengage the check engine light ! You find out what code is stored in the engine computer , do the diagnostics , fix the problem an the light will go out ! If you disconnect the light bulb an sell the vehicle , you could set yourself up for a law suit !

Aug 19, 2016 | Cars & Trucks

1 Answer

Have a 2012 hyundai sonota and i pumped e85 into the tank last night, drove my car today now the check engine light is on. I don't think my car takes E85 but I didn't know that til after I p

If its running o.k. Than I would bet the check engine light is on because there are codes for system too lean. Burn off the tank of e-85 as soon as you can, than fill with regular unleaded. The light should go out after several drive cycles after everything has gone back to normal or you can swing by ou local parts store and see if they can clear the codes

Oct 14, 2012 | Hyundai Cars & Trucks

1 Answer

99 Intrepid 3.2 engine stalls no check engine lite. Does not happen often but usually within first 15 minutes or so after first start of the day. About 10 times in last 5 months. Sometimes immediate...

Does this trips the check engine lamp to store a code? If possible you should take the Vehicle near a local auto parts store to have the code retrived. How many miles are on your vehilce?

May 09, 2011 | Dodge Intrepid Cars & Trucks

3 Answers

Just 2 days a go my honda cr-v 2002 light engine check on the car running well like nothing wrong. plz what is problem

Today's cars have many sensors. These sensors read various engine conditions during the operating stage. Since your vehicle did detect an 'abnormality", I would Take your vehicle to a local auto parts store (e.g. Auto Zone). They will will diagnose the problem by reading the *Check Engine Light" code. This is a free service. Only then will you be able to correct any potentail problem.

Good Luck!

Feb 02, 2011 | 2002 Honda CR-V

2 Answers

When "check engine" light stay

Check engine could be any of many faults but instead of going to dealer, stop by a local Autozone, Advance,etc auto parts store and have them perform a FREE fault scan. They'll come out to your car, plug in their scanner, read the codes, print you out faults found (in ENGLISH - not code) and advise you, then they'll reset your lights - best part - FREE

Jan 04, 2011 | 2001 Honda Passport

2 Answers

My car check engin light is on. I do not know why that came on.

Stop at your local auto parts store and have them check it they can tell you what codes are showing and what they mean and its free.

Nov 07, 2010 | 2002 Volvo V70

1 Answer

2006 explorer with 68000 miles stalled last night. wrench light and check engine lights came on. now, just check engine light. mechanic says throttle sensor needs to be replaced. does computer need to also...

You can buy the TPS Sensor, at any auto parts store, and install yourself.
Just two torx screws ,T-20 I believe, About $78.00,check etc.

No reprogramming of PCM. Don't know where that came from.

You better have a TPS Code set, or know how to test it.
Even the pros throw parts at vehicles,without testing first.
Test it and do yourself.

Oct 08, 2010 | 2006 Ford Explorer

2 Answers

2002 Jeep Cherokee with 22,000 miles has check engine light on. What can this be so early in the mileage

There are hundreds of things that turn on the check engine light, some are simple, like the gas cap loose, others are more complicated. A good thing to try is to stop by a local auto parts store, such as Auto zone, and most will scan your code for free and tell you what possibly caused the light. This way you can know for sure !

Nov 17, 2009 | 2001 Jeep Cherokee

2 Answers

The engine light just came on

There are hundreds of reasons for the check engine light to illuminate, and a common cause is a loose gas cap. check your cap, and if it looks tight, stop by a local auto parts store, such as a Autozone, and they usually will check your car for free, and give you an idea as to what caused the light

Nov 03, 2009 | 2000 Volvo S40

1 Answer

The check engine light came on ou car last night.

could be but have car scanned some auto stores such as auto zone / advanced auto do it for free the code will give u a start point---may be a mileage service request or may have a problem they car also reset the code for u

Nov 01, 2009 | 2004 Saab 9-3

Not finding what you are looking for?
1996 Mercury Grand Marquis Logo

366 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercury Experts


Level 3 Expert

78267 Answers


Level 3 Expert

5655 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Are you a Mercury Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides