Question about 2000 Ford Explorer

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Emissions i have a 2000 ford explorer and have got codes po174 system too lean po171 systemm to lean po300 multiple cylinder misfires just wanted to know the best place to start

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  • Anonymous Mar 25, 2014

    misfiring on multiple cylinders white smoke out exaust

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I would start with the Mass Air Flow sensor.  It is located on the air intake line just after the air filter on the way to the engine.  You can take the lines off both sides of it and spray it out with carb cleaner.  You will have to clear the codes after that.  If that doesn't fix it you might have to replace the Mass Air flow Sensor.  Hope this helps.

Posted on May 17, 2009

  • Keith Heavilin
    Keith Heavilin May 17, 2009

    One other thing that it could be is a vaccum leak, in which you would be looking for dried up or cracked vaccum lines.

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Replace your oxygen sensors 1 either side of your block in the exhaust system just after your manifolds look like spark plugs with a wire coming out driver side one is a doosy! you may need to go threw the wheel arch if you dont have go go gadget arms!

Posted on Jun 16, 2009

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Check engine light code p2196,p2197, po300 ,304,305,306,p2 ,Im freeking out.


P0300 Random/Multiple Cylinder Misfire Detected P0301 Cylinder 1 Misfire Detected P0302 Cylinder 2 Misfire Detected P0303 Cylinder 3 Misfire Detected P0304 Cylinder 4 Misfire Detected P0305 Cylinder 5 Misfire Detected P0306 Cylinder 6 Misfire Detected P0307 Cylinder 7 Misfire Detected P0308 Cylinder 8 Misfire Detected P0309 Cylinder 9 Misfire Detected P0310 Cylinder 10 Misfire Detected P0311 Cylinder 11 Misfire Detected P0312 Cylinder 12 Misfire Detected P0313 Misfire Detected with Low Fuel P0314 Single Cylinder Misfire (Cylinder not Specified) P0315 Crankshaft Position System Variation Not Learned P0316 Misfire Detected On Startup (First 1000 Revolutions)

Read more at: http://www.obd-codes.com/trouble_codes/
Copyright © OBD-Codes.com
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P2195 O2 Sensor Signal Stuck Lean Bank1 Sensor 1 P2196 O2 Sensor Signal Stuck Rich Bank1 Sensor 1 P2197 O2 Sensor Signal Stuck Lean Bank2 Sensor 1 P2198 O2 Sensor Signal Stuck Rich Bank2 Sensor 1

Read more at: http://www.obd-codes.com/trouble_codes/
Copyright © OBD-Codes.com http://www.obd-codes.com/p0002

May 07, 2015 | 2006 Ford Taurus SEL

1 Answer

My 2000 has codes po171 po300 po 463 po480 what


P0171 =system too lean (bank 1)
P0300 = multiple misfire
P0463 = fuel level sensor circuit high input
P0480 = cooling fan 1 control circuit

Aug 16, 2013 | 2000 Oldsmobile Silhouette

1 Answer

I have a 2000 model expedition and the codes po174 and po171 are popping up, along with po301 and po306 showing misfire. How can I fix that?


P0174/0171 are bank 1-2 running lean (insufficient fuel) which is related to the misfire codes. When there is a misfire detected, the computer shuts fuel to those cylinders triggering "too lean" codes. These vehicles are known for ignition coil failures. I'd recommend you replace all ignition coils (qty of 8) as they do have a short life span. Replace with another brand (not motorcraft/Ford), such as MSD/Accell/BOSH etc. hopefully this helpd!!

Oct 06, 2010 | 1998 Ford Expedition

3 Answers

2003 Ford Ranger 4x4 extended cab- diagnostics checked and got these codes- P0171, P0174, P0300, P0316. Can you tell me what they mean?


P0171------ system too lean bank#1
Po174------ system too lean bank#2
For these 2 codes, try cleaning the maf sensor (mass air flow), that is mounted in the big black hose that goes from the air filter housing to the throttle plate, if it is dirty, that will cause those 02 sensors to send a signal to the computor to lean the air fuel mixture. If cleaning it doesn't work, the sensors will probably need changing.
P0300---- Random/multiple cylinder misfire
P0316---- Cylinder misfire at start up---- first 100 revolutions.
On those 2 codes, you have to do some testing to find out why there is a misfire.
Possible causes:
dirty/malfunctioning injectors
weak coil pack
fowling spark plugs/wires
Low fuel pressure

May 11, 2010 | 2003 Ford Ranger Regular Cab

1 Answer

Error codes appeared on 2003 GMC Yukon PO170 too lean bank 1 PO174 tool lean bank 2 PO300 multiple cylinder misfire Still runs OK, idles a bit rough.


Check the intake manifold gaskets for leakage. It will tend to run rougher in the morning when it is cold. Check for vacuum leaks on any hose connected to the intake plenum too.

Dec 13, 2009 | 2003 GMC Yukon

1 Answer

Fault codes, PO300, PO171 and PO174


The Po300 is a random misfire code where the PCM is picking up the misfires. The other two codes are lean mixture codes. More than likely these are due to bad intake manifold gaskets allowing unmetered air to enter the engine causing the engine to lean out and possibly run a little rough when cold.

Nov 07, 2009 | 1999 Ford Explorer

1 Answer

Lack of fuel when accelerating


This might help. It looks like you O2 sencor had gone bad or the signal has and causing multiple mis fire. according to your codes. 
PO171 System too Lean (Bank 1

PO174 System too Lean (Bank 2)

PO300 Random/Multiple Cylinder Misfire Detected

Causes of PO300
Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns

I'ld start with chaning the O2 sensors first but sheck for bad wire connection. Hope this helps and good luck

Apr 08, 2009 | 2004 Ford F150

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