Question about 2000 Ford Taurus

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2000 taurus scanned results p0304 cylinder 4 misfire

These results wher also with the p0171 and p0174

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It may need new spark plug wires a ran in to this once after coil packs computer it was a 30 dollar set of wires

Posted on Feb 10, 2012

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Posted on Jan 02, 2017

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SOURCE: 97 ford taurus: Cylinder 2 misfire

Assuming the plugs and wires have been changed. I would look at the bottom of the coil pack. They tend to crack and short out.

Or if it's got coil packs they will also crack and short out.

Posted on Jul 26, 2008

tripletauto
  • 1450 Answers

SOURCE: Mass Air Flow Sensor, oxygen sensor and coil plugs

look for vacuum leaks the last 4 codes are lean codes
primarily lookm at the pcv hose noturious for collapsing

Posted on Sep 16, 2008

  • 6 Answers

SOURCE: diagonostic trouble codes reported p0171

P0171 is system too lean bank 1, P0174 is too lean bank 2, and 302 is misfire bank 1. Look for vacuum leaks. If you don't find them, put a vacuum gage on it can check. The P0171 is almost always a vacuum leak. If not other possibilities are front O2 sensor is too old and should be replaced (if mileage is greater than 100k then replace). Try injector cleaner. Misfires are usually bad spark plugs, but could possibly be caused by insufficient fuel. I've never had a car of mine in bad enough shape to have that error.

Posted on Oct 24, 2008

  • 116 Answers

SOURCE: 98 E-250 Rough Idle; codes p0156,p1131,p1151,p0301,p0171,p0174+

po301 thru po306 all misfire codes cylinder 1-6 remove plugs and replace them..... set the plug gap first
i suggest u replace the wires also if they never been replaced all these misfire codes can set the others and one is for the oxygen sensor ( 02s or HO2S) CIRCUT MALFUNCTION do u know how to check wireing systems
do the tune up plugs (set gap) .052-.056 change the fuel filter also. clear the codes hows it run
this info is for 98 E-250 4.2Litre
what engine do u have 4.2L or 4.6L i know it is a v-6 by the codes

Posted on Dec 15, 2008

motor1258
  • 6674 Answers

SOURCE: codes p1131,p1151,p0171,p0174,p0304

All are fuel related , as in running lean. I'd start by checking all vacuum lines for possible leak, then buy some spray cleaner for MAF sensor & give it a good spray or tuner spray from TV repair place or radio shack, is even better. Ford says not to (they'd rather sell new part) but it will work at least long enough to see if that's the problem before you replace a bunch of parts.

Posted on Aug 08, 2009

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Codes po303, po171, po137. po420


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Dec 02, 2015 | 2005 Toyota Corolla

1 Answer

I would like to know what these codes mean


P0171 System Too Lean (Bank 1)
P0174 System Too Lean (Bank 2)
P0301 Cylinder #1 Misfire Detected
P0302 Cylinder #2 Misfire Detected
P0304 Cylinder #4 Misfire Detected
P0306 Cylinder #6 Misfire Detected

Mar 12, 2014 | 1999 Ford Explorer

1 Answer

1999 ford ranger 4.0 cylinder 4 misfire


If you are mechanically inclined make sure the number four wire is tight at both ends. at the spark plug end see if you can wiggle the plug, make sure it is tight and gapped properly.

Feb 06, 2014 | Cars & Trucks

1 Answer

System to lean bank, manufacturer control fuel air metering, cylinder misfire detected


Intake or vacum leak will be the first codes 174,171, try idle and spray propane around intake if car idles up, then intake is leaking, otherwise could be a broken vacum line, check with a gauge

Jan 18, 2014 | 2004 Hyundai Tiburon GT V6

2 Answers

P0313;Misfire Detected with low fuel P0171-System too lean{bank1} P0174 System too lean{bank2} drive cycle


P0313 - Misfire Detected with Low Fuel
P0174 -System too Lean (Bank 2).
P0171 -System too Lean (Bank 1).

P0171 and P0174 mean "system too lean" for banks 1

Aug 24, 2010 | 2000 BMW 3 Series

1 Answer

P0304 is what?


P0304 is Cylinder 4 Misfire Detected.

Basically, your number 4 cylinder is misfiring. Maybe a bad spark plug, or bad fuel injector. These causes are only guesses because many thing can cause a misfire in one cylinder.

Sep 21, 2009 | 1996 Ford Taurus

1 Answer

2000 CIVIC System too lean Cylinder 3 and 4 misfire Deteced


  1. P0171: This means that the oxygen sensor has detected a lean air-fuel ratio. This can be caused due to a vaccuum leak or a problem in the HO2S circuit or the HO2S (Heated Oxygen Sensor) itself. (Bank one Sensor one). This is commonly located along the exhaust pipe. It could also be a bad Mass Air Flow sensor or a bad Engine Coolant Temperature sensor. Diagnostic checks will be needed to be carried out to be verified though
  2. Well as for the other codes, it means #3&4 cylinders are misfiring. It is a possibility that the P0171 code mite have caused the others to show up. I can be wrong though. But it is a strong possibility. If the air fuel mixtue is too lean indeed, mis-firing will occur, unless it is an actual electronic and not a mechnical problem. By the way, when these codes appear, how is the engine's performance. Does it remain the same or behaves poorly?

Feb 14, 2009 | 1999 Honda Civic

2 Answers

Diagonostic trouble codes reported p0171 p0174 p0302 2001 Taurus, only reports P0171


P0171 is system too lean bank 1, P0174 is too lean bank 2, and 302 is misfire bank 1. Look for vacuum leaks. If you don't find them, put a vacuum gage on it can check. The P0171 is almost always a vacuum leak. If not other possibilities are front O2 sensor is too old and should be replaced (if mileage is greater than 100k then replace). Try injector cleaner. Misfires are usually bad spark plugs, but could possibly be caused by insufficient fuel. I've never had a car of mine in bad enough shape to have that error.

Sep 14, 2008 | 2001 Ford Taurus

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