Question about 2001 Mercury Villager

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2001 merc villager got the code for maf sensor, replaced with aftermarket, no good. then replaced with genuine merc maf sensor. continues to run poorly, same symptom: hard start, rough idle and rough run, dies at stops, won't normally go over 30 mph

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  • Mercury Master
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Disconnect battery for 2 hours to clear memory. then reconnect and drive 10 miles so computer can relearn new sesnors.

also go here, we can help if it does not fix it

http://groups.yahoo.com/group/villagerquest/

Posted on Jan 02, 2010

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Posted on Jan 02, 2017

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What does a digital trouble code P0172 mean?


System Too Rich (Bank 1) What does that mean? Basically this means that an oxygen sensor in bank 1 detected a rich condition (too little oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. Note: This DTC is very similar to P0175, and in fact your vehicle may show both codes at the same time. Symptoms You will more than likely not notice any drivability problems, although there may be symptoms such as a misfire. Causes A code P0172 may mean that one or more of the following has happened: The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry. There could be a vacuum leak. There could be a fuel pressure or delivery problem Possible Solutions Possible solutions include: Inspect all vacuum and PCV hoses, replace if necessary Cleanthe MAF sensor. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling Inspect fuel lines for cracks, leaks, or pinches Check the fuel pressure at the fuel rail Check the fuel injectors, they may be dirty. Use fuel injector cleaner or get them professionally cleaned/replaced. Check for an exhaust leak before the first oxygen sensor (this is unlikely to cause the problem, but it is possible)

Read more at: http://www.obd-codes.com/p0172
Copyright © OBD-Codes.com

May 07, 2015 | 2001 Mercury Villager

1 Answer

Code P0171, what is problem


code p0171 refers to system too lean, bank 1 causes---intake /exhaust leak---AIR system---MAF/VAF sensor---fuel pump pressure/pump---injectors---HO2S (Oxygen sensor)
Replace the faulty units with genuine one because most
aftermarket units are not set for OEM cpu units and are not completely compatible.

May 05, 2013 | 2003 Ford Windstar

1 Answer

My 124 260e A/T merc benz starts fine and accelerates fine and runs fine for the first 4-5 minutes. After which, no matter how I press the accelerator pedal, there's just no speed/throttle. Hence


black smoke is flooding( uncontrolled injector operation
run the fault codes to determine the problem area ( ECM , fuel pressure , faulty injector control, MAF/VAF sensors or failed heated oxygen sensors

Aug 01, 2017 | 1988 Mercedes-Benz 190

2 Answers

Car Jacking


asically this means that there is a problem with the Mass Air Flow (MAF) sensor or circuit. The PCM detects that the actual MAF sensor frequency signal is not within a predetermined range of the calculated MAF value for more than 4.0 seconds. The simplest thing to do is to reset the code and see if it comes back. Then start with the cheapest, easiest repair procedures:
  • Inspect for the following conditions:
    An incorrectly routed harness--Inspect the harness of the MAF sensor in order to verify that it is not routed too close to the following components:
    - The secondary ignition wires or coils
    - Any solenoids
    - Any relays
    - Any motors
  • A low minimum air rate through the sensor bore may cause this DTC to set at idle or during deceleration. Inspect for any vacuum leaks downstream of the MAF sensor.
  • A wide open throttle (WOT) acceleration from a stop should cause the MAF sensor g/s display on the scan tool to increase rapidly. This increase should be from 6-12 g/s at idle to 230 g/s or more at the time of the 1-2 shift. If the increase is not observed, inspect for a restriction in the induction system or the exhaust system.
  • The barometric pressure (BARO) that is used in order to calculate the predicted MAF value is initially based on the MAP sensor at key ON.
  • When the engine is running the MAP sensor value is continually updated near WOT. A skewed MAP sensor will cause the calculated MAF value to be inaccurate. The value shown for the MAP sensor display varies with the altitude. With the ignition ON and the engine OFF, 103 kPa is the approximate value near sea level. This value will decrease by approximately 3 kPa for every 305 meters (1,000 feet) of altitude.
  • A high resistance on the ground circuit of the MAP sensor can cause this DTC to set.
  • Any loss of vacuum to the MAP sensor can cause this DTC to set.
If you suspect the condition may be related to aftermarket accessories, refer to Checking Aftermarket Accessories in Wiring Systems.


Jun 07, 2010 | 2005 Volvo XC90

2 Answers

Fault Code reads MAF Sonsor even after replacing the part


It is very possible that you have an open circuit in your connector. I do agree that aftermarket parts have different resistance valves than the OEM, but in this case I think you have more of an electrical problem than a parts replacement problem. Check continuity from the MAF connector to the ECM. Make sure you clean out the air cleaner box and install a new OEM air filter. Aftermarket filters don't alway fix properly and can leave an air gap around the filter. This can allow debris to enter the engine and also contaminate your MAF.

Jul 21, 2009 | 2004 Nissan Sentra

1 Answer

Code p1130 p0171


P0171- mens the MAF sensor is dirty and needs cleaned. You can get MAF cleaner at your local auto parts store. The MAF is located in the air intake just after the air filter
P1130- is more than likely a result of the previous code. It is in regard to the feul/air mixture ratio. A dirty MAF can cause this code.
Also, if you are using an aftermarket oiled air filter, it would be the cause of the P0171 code.

May 16, 2009 | 2001 Toyota Tacoma

1 Answer

Losing power on hills


no, clean the 2 elements on your MAF sensor with carb cleaner and a tooth brush gently. you are running lean.

Go to this site for repair files & photos.

http://autos.groups.yahoo.com/group/villagerquest/

Mar 02, 2009 | 2001 Mercury Villager

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