Question about 2003 Mercury Grand Marquis

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Engine light on 2003 Grand Marquis code p 2197 "lean"

Should I start with replacement of fuel filter, easy to find? how to check for vacuum leaks?

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  • ron_mccarty May 26, 2009

    trouble code checked, p 2197,

    5 probable causes: 1- failed ho2s sensor, 2- open or short cirucit condition, 3- failed fuel pump or blocked fuel filter, 4-MAF sensor failure, 5 vacuum leak

  • matt nadeau Apr 28, 2013

    ok I have done the fuel filter and checked for vacuum leaks I have no engne light to show any sensor problems

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The very 1st thing u do is have the trouble code checked that turned on the light, there are well over 200 possible reasons for a check engine light, a fuel filter is not one of them.

Posted on May 26, 2009

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CHECK ENGINE LIGHT IS ON


This Code is about the RPM not matching the idle settings. A Vacuum leak is tricking the engine into making adjustments based on a lean O2 reading. Correspondingly the O2 sensors are demanding more fuel to eliminate the lean readings. Then the engine realizes the amount of air going by the MAF is not matching the IAC settings(Because the air leak is increasing rpm) and blames the IAC which is a Code P1506.

With the engine running, use an old spray bottle and fill it with water. Spray the seams, vacuum lines and solenoids until you notice a change in RPM. Lastly, spray the EGR pod if the diaphragm is torn it will leak vacuum.

Wherever you find the leak, fix it, then clear the computer and drive it.

Feb 19, 2014 | 2000 Mercury Grand Marquis

2 Answers

Obd code system to lean bank 1&2


Lean on Bank 2 means one side of the engine is getting less fuel or too much air. I also own a 4.0L and I work on these models for this code consistantly. Usually if you have a vacuum leak at the pcv valve hose behind the throttle body you will get a lean Bank 1 and 2.
My recommendation in these cases would be to change the PCV valve (helps with your gas milage) and the fuel filter; other than that you will have to be sure the fuel pressure is correct and there is no vacuum leaks on the driver side of the engine. I am 90 percent sure the fuel filter, pcv valve and clearing the codes will correct this issue.

Here I find one TSB...
MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED - SYSTEM LEAN DIAGNOSTIC TROUBLE CODES (DTC'S) - SERVICE TIPS

FORD:
2000 Contour
2000-2002 Escort
2000-2003 Escort ZX2
2000-2004 Crown Victoria, Focus, Mustang, Taurus
2002-2004 Thunderbird
2000-2003 Windstar
2000-2004 Econoline, Excursion, Expedition, Explorer, F-Super Duty, Ranger
2001-2004 Escape
2004 Freestar
2000-2004 F-Series

LINCOLN:
2000-2002 Continental
2000-2004 LS, Town Car, Navigator
2002-2003 Blackwood
2003-2004 Aviator

MERCURY:
2000 Mystique
2000-2002 Cougar
2000-2004 Grand Marquis, Sable, Mountaineer
2004 Monterey

ISSUE: This article is intended to aid in diagnosing DTC's P0171, P0174, P1130, P1131, P1150, P1151, P2195, or P2197 (system lean or lack of HEGO switches) when a vacuum leak is present. HEGO sensors, MAF sensors, and PCM replacements are not an effective repair when a vacuum leak is causing the above DTC's.

ACTION: Perform the following inspections/repairs when the above codes are found in memory. Procedure provides instructions on how to make comparisons of the total fuel corrections (using scan tool or equivalent) at idle and high RPM's to help determine if a vacuum leak is the root cause of the DTC's.

SERVICE PROCEDURE:
NOTE FREEZE FRAME AND ADAPTIVE FUEL VALUES (ASSOCIATED WITH "LONGFT" PID) WILL NOT BE AVAILABLE IF A KAM OR OBDII RESET WAS RECENTLY PERFORMED.

NOTE FREEZE FRAME DATA WILL INDICATE THE ENGINE AND AMBIENT CONDITIONS WHEN THE DTC WAS SET. THESE ARE IMPORTANT BECAUSE THE VACUUM LEAKS MAY OCCUR ONLY WITHIN SPECIFIC TEMPERATURE RANGES AND MUST BE DUPLICATED TO DETECT THE LEAK.

NOTE FUEL TRIMS AT IDLE ARE PARTICULARLY SENSITIVE TO VACUUM LEAKS SINCE THE UN-METERED AIR LEAKAGE FLOW IS A HIGHER PERCENTAGE OF TOTAL AIRFLOW AT IDLE THAN AT PART THROTTLE. THE BAROMETRIC PRESSURE (BP) PID IS NOT RECOMMENDED TO VIEW WHEN DIAGNOSING A VACUUM LEAK. BP IS AN INFERRED PID CALCULATED DURING HIGHER ENGINE LOADS.

Jan 20, 2012 | 1996 Ford Explorer

1 Answer

Rough ide while in drive: code PO171 and PO442 action taken: put in iridium plugs 60,000 miles ago, recently cleaned throttle body, use bottle of fuel injector cleaner, used bottle of Heet in case...


easy fix..o.k. a P0171 is a lean engine dtc..witch means wrong air fuel mixture..ideal is 14.1 yours is lean...witch means more air than fuel..check to see if there is a intake manifold leak..or vacuum leak.spray small amount of carb cleaner around intake manifold gaskets and see if engine smooths out if it does its a gasket also check for vacuum leaks around air filter rubber snorkle.and all vacuum leaks...if these check out ok...replace the 1st 02 sensor it also controls air and fuel and will cause this issue....as far as a P0442 thats your fuel evap system witch is un related to the first code make shure your fuel cap is tight and sealed...if so replace the evap vent control valve on the canister in the rear by the fuel tank..

Apr 19, 2011 | 2003 Toyota Matrix

3 Answers

I started having a problem about a month ago. My 2003 Mercury Grand marquis LSE tuned up at 100k currently 145k. started hesitating and slight bucking at cruise speed. I went to autozone and coded #8...


A misfire can be related to a number of causes. Since the coil and spark plug were replaced and it did not solve this issue, it is most likely related to the circuit for the number 8 cylinder. A thorough inspection of the electrical circuit is what is required next. Also, engine compression will need to be tested on that cylinder as well as cylinder number 6 that is next to it. Vacuum leak around the intake port of the number 8 cylinder could also be a cause and will need to be checked.

Mar 31, 2011 | 2003 Mercury Grand Marquis

1 Answer

My 2005 Ford Taurus is giving code 2195 and 2197, what can be the problem?


Both codes are O2 Sensors--lean, trying to correct
for over rich condition

I show 27 possible causes for that

If the fuel pressure is okey ,and you have no
vacuum leaks,maybe the sensors failed

The front 2 closest to the engine, are to be
replaced at 100,000 miles

Mar 02, 2011 | 2005 Ford Taurus

1 Answer

2003 GMC Sierra Has recently developed rough idle/lope at idle which sometimes goes away. Runs fine otherwise. Scan codes-Lean condition bank1 and bank2. Random misfires on all cylinders. Fuel pressure...


You never replace anything, on a Wishing,Hoping,Pushing,Poking,diagnostic approach

You learn the vehicles Systems,Test,then Replace,if you have a failed component.

Work on the Misfire Issues.
Then you lean O2 Codes will go away.

Not a the plugs.

Think lean---Vacuum leaks,EGR Valve leak,EVAP System leaks,anything with a hose that lets air into the intake system.
Exhaust System leaks,near sensors

Nov 24, 2010 | 2003 GMC Sierra 1500

2 Answers

HAVE A 99 GRAND PRIX WITH CODE P0171 SYSTEM LEAN-BANK 1. I REPLACED THE OXYGEN SENSOR ON THE REAR MANIFOLD THAT IS CHANGEABLE FROM TOPSIDE. LIGHT/CODE IS STILL COMING ON AND SHUTTING OFF BY ITSELF. CAR HAS...


po171 is a lean code, and could be likely caused by a plugged fuel filter, or a weak fuel pump, I would recommend changing the fuel filter first since its cheaper.. The filter is located under the rear of the vehicle by the fuel tank, if this doesn't help run, or have run a fuel pressure check to determine if that is the cause. Also look carefully under the hood for any hoses or lines disconnected causing a vacuum leak, this can also cause a lean code

Jan 09, 2010 | 1997 Pontiac Grand Prix

2 Answers

Engine check light read p0171 and p0420, noticed a leak of engine oil on cylinder 2 area of head gasket when checking the sparks plug, is that the cause?


P0171 code is described as: lean condition bank 1, oxy sensor 1. If your vehicle is a 4 cylinder, which I believe it is.. you have got a lean air/fuel mixture being found by the ecm(computer).This can be caused by several things. The first of which is a possible vacuum leak at or near the intake manifold. This can also be caused by a MAF(Mass Air Flow) sensor problem or even by something as simple as a clogged fuel filter. This lean condition could also be the cause of the P0420 :described as a catalyst efficiency problem. It would be best to have the vehicle taken to a reputable repair facility that is capable of engine performance diagnostics and have them run tests for these codes. The gasket you mention is most likely a valve cover gasket not the head gasket and would not cause these codes. Although you should have this leak fixed before it becomes a problem.

Hope this helps..

Apr 20, 2009 | 2003 Toyota Camry

1 Answer

Codes P0171 and P0316


code po316 is a random misfire like plugs or wires po171 will cause po316 po171 is a lean o2 code on bank # 1 that is a vacuum leak need to check it better for a vac leak

Dec 14, 2008 | 2003 Ford Windstar

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