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Anonymous Posted on Nov 12, 2011

Have codes po300 po301 po302 po316 - 2004 Ford Focus

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  • Posted on Nov 12, 2011
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Joined: Oct 06, 2011
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Its like you have cylnder misfire or more , did you check all the wire .plug if any one bad or the wire have fire , and you check if the fuel pump good . i would like to ask you that , Did the problem come on suddenly or was some previous action or work done......

  • 2 more comments 
  • Anonymous Nov 12, 2011

    in febuary replaced plugs wires and coil. checked fire by pulling off wires at plugs 2 and 4 had real
    good fire and 1 and 4 had little fire

  • Anonymous Nov 12, 2011

    car has bad sound on top end also. going too pull and cut open oil filter. car is daughters and dont know in problem came on sudden or what

  • Anonymous Nov 13, 2011

    if you can open the had cover and see if the camshaft is OK .and let me know .

  • Cali Hart
    Cali Hart Jan 01, 2014

    it was from one start up to the next ran fine for first trip about 7 miles turn off started back up 15 min latter had not made it a half mile when it started acting funny then back fired and loss of alot of power just put new coil on and now wont even start

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If you are getting all these codes your best and safest option is to take it to a good mechanic. These codes are for lots of different problems like misfires and EGR issues.
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2003 acura tl error codes po301 po302 po304 po306 p1399 po300

PO300 and P1399 are random cylinder misfire detected.
PO301 cylinder 1 misfire
PO302 cylinder 2 misfire
PO304 cylinder 4 misfire
PO306 cylinder 6 misfire
I would say that you have damage to the ignition wiring harness or you ECM is failing.
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Po300 po301 po302

replace plugs and wires and try some drygas
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2008chevy malibu misfire

Which code you have po300 or po301.po302 .PO301,PO302 will be coil or module.PO300 could be bad spark plugs,vac. leak,clog fuel filter,bad fuel pump,bad battery.
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02 hyundai accent engine quit running won t start codes come up po300 po301 po302 not familiar with 4 cylnders when turning over sounds like no compression

codes p 0300 is random misfires and codes p0301,2,3,4,5,6,7,8 are the cylinders that are misfiring
so un you statement the problem cylinders are 1 and 2
misfires are normally problem injectors and low fuel pressures so have the fuel pressure checked to make sure that the pump is running correctly, the pressure regulator is operating correctly ans the EVAP system is venting the tank correctly
use a couple of injector cleaner in the tank to clean the injectors
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CODES-PO301-PO303-PO316- CHANGED PLUGS & WIRES. STILL MISS ON START UP, GOES AWAY MOST OF THE TIME ABOVE 1000 R.P.M

P0301 - Cylinder 1 Misfire Detected.

Causes:
- Improper spark plug at cylinder #1
- Insufficient compression at cylinder #1
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #1
- Fuel injector #1 may be faulty
- Intake air leak

Solutions:
- Perform Injector Service
- Replaced Spark Plug #1
- Replaced Injector #1
- Replaced Ignition Coil #1

P0303 - Cylinder 3 Misfire Detected.
Follow info from P0301.

P0316 - Misfire Occurred In The First 1,000 Engine Revolutions.

Causes:
- Damaged CKP sensor.
- Ignition System.
- Fuel Injectors
- Running out of fuel
- Fuel Quality
- Base engine
- Damaged Powertrain Control Module

Solutions:
Usually the P0316 is combine with a P03XX codes. The P03XX code indicates in which cylinder the misfire occurred.
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Audi 2000,1.8 turbo,code po300,po301,po302

P0300 - Combination misfire detected
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If it has a lot of miles it needs a tune up.
Fill tank with high quality premium fuel
Check fuel pressure
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Po302 code,po301,po300

usually a p0300 is a random missfire code due to a fuel problem probaly bad gas , use some in tank fuel treatment such as techron or lucas injector cleaner, after adding fuel disconnect negative terminal to batt, to clear codes and see what happens
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