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Reset computer MIS FIRE CODES RUNNING VERY BAD

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Multiple code 0141, 0137,0301,0131,0135


p0301 engine mis-fire #1 cylinder
other codes are 02 sensor codes

Dec 12, 2013 | 2003 Buick Rendezvous

2 Answers

Runs rough,stalls,no power,codes 401,441,446/02 camry 4cyl.


Not sure but you could try resetting you cars computer by taking off battery cables and count to 20 the put them back on,then restart engine. You will have to reset your clock after taking off battery cables.

Nov 15, 2012 | 2002 Toyota Camry

1 Answer

I have a '03 Toyota Celica GT-S with a annoying mis-fire. Started small by replacing all spark plugs - nothing. Replaced the MAF sensor - nothing. Took it to a authorized toyota shop & checked...


Replaced the MAF sensor - nothing. Took it to a authorized toyota shop & checked compression which check out good and put the computer on. Computer read mis-fire on cylinder 1, and then multiple misfire (like it would jump around). We went ahead and replaced the fuel injector on cylnder 1 - did not solve problem as when we hook the computer up, misfire seemed tp stay at idle and seem better when running high RMP, but check engine light is on as it never went away. Went ahead and replaced the coil pack to cylinder 1 - nothing. what am i missing?

Feb 06, 2011 | 2003 Toyota Celica

2 Answers

04' Ram 1500, bad mis-fire. cust repl s/plugs. no help. Codes for coils #7 & 8 w/mis-fire. replaced coils & wire set. Better, but still P0300. Compression good


You still have random misfires (PO300)
You most likely replaced those coils that set a code, and those were not the one bad offender,spiking the computer module.
Take a new coil and put in a cylinder,no change, replace old coil and move new one to next cylinder. You can do that once or twice a day, if you have nothing else to do. You need a 90 degree day, to really get that solved,unless you have an ignition oscilloscope.
Never had a bad spark plug in 45 years.

Sep 18, 2010 | 2004 Dodge Ram 1500

1 Answer

How can I clear the misfire on #4 cylinder code?


If you have not repaired the #4 mis-fire problem then re-setting or clearing the code will only last until the mis-fire is detected again (maybe only minutes or even seconds depending how bad the mis-fire is), and then the MIL (malfunction indicator light) will be right back on. Try changing the #4 spark plug and ignition wire first, if this does not solve the problem then there might be something more seriously wrong with your engine.

If you do not have a scanner to reset the MIL, then you can reset the MIL by dis-connecting the battery for three minutes and then re-connect the battery, and all of the data trouble codes should be cleared.

Apr 27, 2010 | 2002 Saturn Sl

1 Answer

Reads codes of po300,po302,po303,po305


Hi these are mis-fire codes ,
P0300 is a general mis-fire detected code the others relate to specific cylinders,
P0302 is cylinder 2 misfire
P0303................3........
p0305..................5........
I would check your spark plugs first if Ok you need to make sure the coils are working ok for this you need an osciloscope to check output voltage if your not sure then take to a qualified mechanic with Cadilac experience it could be caused by an air leak,bad ECT sensor or even Mass air flow sensor ,codes only tell you the result not the cause

Jul 24, 2009 | 2003 Cadillac CTS

1 Answer

Check engine light


It might but what exactly are the codes. Before you change the Mass air flow sensor, try cleaning it first with a can of mass flow cleaner.
If your running a oil K&N filter, there could be some oil residue on the sensor. Start with that and change the filter or clean it if it's a K&N.
The O2 sensor's could be bad also, you really need the code's to be sure what sensor is giving you the faulty signal.
Good luck and hope this helps.

May 05, 2009 | 2005 Ford Focus

1 Answer

No ck eng. lt, but have error codes on scanner


Yes. 1 is a bad O2 sensor and the other a mis-fire.

Best thing to do is a major tune up (replace plugs/wires/fuel filter/PCV valve/etc...) and also replace the Bad O2 sensor.

Running it like this can cause long term damage. Let alone you are losing gas milage as well.

Good luck.

Apr 16, 2009 | 1997 Dodge Caravan

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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