Question about Mercury Grand Marquis

1 Answer

I have 95,000 miles on my Grand Mercury LS car. Tonight my engine light came on with 1/2 tank of gas. I checked the gas cap (appeared okay - full tank fill up yesterday before my 175 mile road trip - no problems experienced). Per the owner's manual I turned the car on 4 normal times and the check engine light is still on. On the last attempt, the dash blacked out momentarily after about 10 seconds and the engine had a heavy sigh and resumed normal idle. No previous problems before (full service oil change 700 miles ago and tire rotation yesterday).

Posted by on

  • Anonymous Mar 24, 2011

    Give us the codes you got, when
    the check light came on

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,654 Answers

The check engine light is not a big cause for concern. Most of the time it relates to emmision controls or engine controls, but it will not die on you from one of these conditions. Simply get a auto parts store to pull the code for you and find out what is causing the light to come on. I know Autozone pulls codes for free, once you find out what is tripping the light we can go from there on fixing it. If you do manage to reset the light if the problem is still there the light will return. What happened earlier was the cars computer reseting and relearning the idle speed.

Posted on Mar 24, 2011

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
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.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

2003 trailblazer check engine light came on when drove in third gear for 20 miles pulling small trailer


over worked engine? check gas cap is secure.

You may have clogged up the O2 sensor/s -- run some #1 gas in the next tank full of fuel.

Jul 14, 2014 | 2003 Chevrolet TrailBlazer

1 Answer

Have 04 mercury grand marquis check engine light is on for code po452 had that fixed and light still on


Well ---PO 452 is still FTP Sensor Circuit Low Voltage Detected
new sensor or not



If the sensor reads less than .22volts with key on /engine off --you get a hard fault (code)


Check Sensor Connector


Sensor with no pressure or vacuum in tank is 2.4 to 2.8 volts
Key On/Eng Off On scan tool PIDS


You just need a shop with a data base & proper test procedure
or a different tech or different dealer.


I have the 2004 gas engine emissions diagnostic manual for all
2004 fords, as I have a Lincoln LS,so I don't know why a pro
couldn't resolve

Nov 25, 2012 | 2004 Mercury Grand Marquis

1 Answer

Check engine light indicator is on...after total


Obviously you have something above the tank that's leaking. That will result in a code the same as a bad or loose gas cap. At this point, the only way you can find the source is to take a good look at everything, even if it means dropping the tank to do that. (better than wasting fuel or having a fire start under there).

Jun 11, 2010 | 2000 Jeep Grand Cherokee

1 Answer

Replaced o2 sensosor, SES light back on


If he used a "universal" O2 sensor, you could have a wiring problem. I had the exact same behavior on a Mazda MPV. The universal O2 sensors have to be crimped to the old sensor connector, which can cause problems. You can check the wiring closely, or insist that he use an OEM sensor, which will have the proper connector attached.

Aug 09, 2009 | Mercury Sable Cars & Trucks

1 Answer

#1 Misses, Engine Light goeos On then Off.


i am wondering is if there is a leak in your pump assembly, in the tank, and as soon as the fuel level gets below that hole, it starts to **** air, or lose pressure.

May 01, 2009 | 1997 Oldsmobile Regency

1 Answer

Engine light comes on 2003 Jeep grand cherokee laredo


Check the Fuel Pump Relay, it may be malfunctioning and need replaced. Also, in some vechicles, if the batter is disconnected and reconnected, the service engine light will come on from time to time, going off and on simultaneously. Have a diagnostics done to see if any codes show up. If no codes appear, then have them all cleared and drive for another 200 miles. Sometimes the computer will need to be cleared a couple times before the light will stay off. Make sure that all fuses and relays are good, and securey in place. Check all factory installed lights to make sure they are good, and securly in place as well.

Mar 31, 2009 | 2003 Jeep Grand Cherokee

1 Answer

Gas gauge not working


Defective sending unit in gas gauge.

Jun 30, 2017 | 1983 Mercury Grand Marquis

1 Answer

2002 Sable LS 43,000 miles. Check Engine light on again!


without a fault code its impossible to diagnose. try pep boys or aamco or auto zone they will pull the code for you, usually for free. The code will relate to a sensor or area to be fixed. This will save you money and needless parts . post the code or codes so we can help

Feb 17, 2009 | 2002 Mercury Sable

1 Answer

Check Engine light on AGAIN!


I have an '01 Sable that posted a Check Engine light and the problem turned out to be a Mass Airflow Sensor.

Feb 17, 2009 | 2001 Mercury Sable

1 Answer

Jeep Grand Cherokee Service engine light soon on


A loose gas cap will sometimes trigger the service light to come on.  Since this appears to have happened on multiple occasions I can assume that this is not the problem but may be associated with it.  The level of gas in the tank affects the amount of atmospheric pressure in the tank. There are multiple things that could set off the light, one being a loose or defective gas cap, and the other is a fuel vapor return valve.  I'm not sure of the exact type of fuel system you have so I cant give a more exact answer.  If you wanted to give something a shot before bringing it into the shop, you can simply replace the gas cap first, a very cheap try. 

Dec 12, 2008 | 2002 Jeep Grand Cherokee

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

209 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercury Experts

yadayada
yadayada

Level 3 Expert

75744 Answers

fordexpert

Level 3 Expert

5495 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

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

Answer questions

Manuals & User Guides

Loading...