2001 Mercury Villager Logo
Chris Roberts Posted on Apr 13, 2016
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2001 mercury villager runs ok when cold the warmer it gets the worse it misses the codes it give me are po300 po180 po325 not sure what problem is just started this few days ago

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Bill Boyd

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  • Mercury Master 53,816 Answers
  • Posted on Apr 13, 2016
Bill Boyd
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Code p0300 refers to random misfires---misfires detected==causes ---spark plug/s --HT lead/s ---injector/s---ignition coil/s---low compression---ECM
code p 0180 refers to fuel temperature sensor A --circuit malfunction === causes ---wiring---fuel temp sensor---ECM
code p 0325 refers to knock sensor (KS) 1 bank 1-- circuit malfunction===causes ---wiring---poor connection---KS
as the codes vary to much and are not related , the first thing I would do is to replace the ECM with a known good unit to eliminate a component failure when it gets hot
after that check wiring for injectors and fuel pump
a lot of misfires can be traced to low fuel pressure and in this case, it could be from a fuel pump failing to produce sufficient pressure when it warms up( shorting out internally)
why I suggest the ECM in the first place is the code for the knock sensor which has little to no relevance to the others and could indicate a ECM problem

Testimonial: "thanks very helpful gives me somewhere to start it started shortly after my wife got gas changed plugs wires throttle positioning sensor been running fine til that point"

  • Bill Boyd Apr 14, 2016

    from questions on problems with engines running rough (missing, low power, not filling the tank easily etc) and the symptoms start after getting fuel the problems are associated with a EVAP system failure either in the vent solenoid or valve or air leakage from a loose filler cap
    As a side suggestion , check the filler cap and run the codes again to see if a code for the EVAP system appears if the previous ideas do not pan out

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Were is the map sencer on 2001 mercury villager and would this be the issue..it runs when u start it up and after it gets warm it wants to stall when u put it in gear ..or when u get it running it spi

possibly but it also could be mass air flow sensor,a fuel pressure problem ,faulty plug wires or even just a cracked dist.cap.
I would stop by a parts store ,Auto Zone or Advance will read the trouble codes for free. There are too many things that could be at fault.The code will give you a clue.If there are no codes(doubtful) suspect a fuel delivery problem.
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2002 mercury villager code po325 code po138 code po139

P0138 O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)
P0139 O2 Sensor Circuit Slow Response (Bank 1 Sensor 2)
P0325 Knock Sensor 1 Circuit (Bank 1 or Single Sensor) -Circuit Malfunction
think you just need a new o2 sensor
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I had a 2001 nissan xterra in my shop,and it had the same codes. there is a very common problem with the distributor on nissan 3.3 motor. I am not sure where you are,but get a price for the distributor. I got one from ebay cheap
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1996 mercury villiager po325 consistantly a problum even after replacement someone mention to relocate it to a grounded quiet place

Do Not ever replace a kncok sensor. It does no harm or no good. Just leave it alone.

yahoo group for villager quest owners for help.
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I have a 1995 ,GM jimmy two codes po300,po325

po300 is multiple cylinder misfire and po325 is the knock sensor
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