Question about 2000 Chevrolet Cavalier

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What does po 300+ mean? Misfire i know.

I have a 2000 Dodge stratus that has a code reading of po 300, 301, 302, 303, 304, 305 and 306. I hate this car with a passion. Took it to smog never had a check engine light on. It measured 54 and that's the max for California but over all it failed because the "monitors" weren't set. ( I change the battery 2 days prior ). I put lucas fuel cleaner in it and within two mins the check engine light came on and has never went off since. When I took it to pep boys that's the codes they pulled off the car. I have practically replaced every damn thing on this car except the spark plugs, plug wires, cat, EGR and oxy sensor . So I'm wondering which one it most likely is!?!?! Also I get bad gas mileage and the car idel's very rough at about 550 rpm but the car still has good power!?!? Any idea's or suggestions? I just want this car to pass smog so I can sell this piece of crap!

Posted by Anonymous on

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  • 459 Answers

You might try replacing the PCV valve. . .just a thought.

Posted on Mar 11, 2017

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 95 GMC Jimmy 4.3l W vin rough idle

My problem was solved when I repaired my 4 wd activation dash switch. The switch was contacting on 2WD & 4HI at the same time. The front differential activation is vacuum activated possibly creating a tug of war that didn't actually engage it but drained off vacuum from the engine? A theory at best but stumbbled across it because I knew the switch wasn't working properly I repaired it and low and behold rough idle disappeared and all is good for 3 weeks running.

Posted on Dec 10, 2008

SOURCE: 98 Cavalier 2.4L engine stumbles at 2000-2500 rpm

Could be a short in the wiring for the O2 sensor.   I currently have the same issue only my car finally threw a code after two days of it acting up.  Code 106.  Changed the MAP sensor and it now throws 108, MAP sensor high voltage circuit.  Ah the joys of cold weather and broke down vehicles.  But I know that you wont always get a code with a short.  Let me know if you fixed the problem.

Posted on Jan 08, 2009

USfalcon
  • 175 Answers

SOURCE: 1998 Chevy s10 4 cylinder running rough

1- check there is spark come from spark wires
2- check the fire timing by looking for every wire in the right place
3- check there is injector signl
4- check for any vacuom leak
5- try to clean the MAF by brake and parts cleaner
6- try to reset all the code and see what will come after that

Posted on Mar 14, 2009

  • 2 Answers

SOURCE: 2000 CHevy Silverado misfire code

try also the knock sensor..computer cant adjust timing

Posted on Sep 26, 2009

iambanshee74
  • 3489 Answers

SOURCE: 2007 aveo misfire faults

gm has a problem with this from way back. double check your spark plugs and if they are not ac delcos, change them. ive seen this time and time again swearing, myself, that there is no way that the plugs would cause this issue. it always comes up with random misfire and usually another 1 or 2 codes misfire codes. put in ac delco, no more codes. let me know

Posted on Feb 22, 2010

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1 Answer

What does po 305 cylinder 4 misfire mean? Po 316 misfire on startup? po 300 random misfire? Po 305 Cylinder 5 misfire?


Hi Micaela:
I'd be looking for ignition problems like shorting out spark plug leads or a bad distributor cap. Try running it in a really dark place and see if you can see sparks around the plug wires.

May 13, 2015 | 2004 Ford Explorer Sport Trac

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I have a 2000 Dodge Stratus with a random misfire on 1,3 and 5. The engine runs fine besides a twitch in the motor that can be felt while idling. Already replaced plugs and wires. Suggestions?


get the OBD codes read this will tell you which switch/sensor is causing the issue , the last random misfire i encountered turned out to be low cylinder compression so if the OBD code says " random misfire " then get the cylinder compressions read , hope this helps

Apr 08, 2015 | 2000 Dodge Stratus

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WHAT DOES PO 688 CODE MEAN DODGE 2003 STRATUS


thats about the ASD relay. the automatic shut down relay. that gives power to the computor

Aug 09, 2014 | 2003 Dodge Stratus

1 Answer

Po340 code on dodge stratus


have you tried typing in the word obd2 before po 340 in google? usually obd2 website pops up with a complete solution of everything it could be... there is some cars or codes that don't specify as well as they should, so in that case take it to autozone where they do free code reading

Jan 05, 2014 | 2002 Dodge Stratus

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What could PO 302, PO 300, PO 105, PO106, PO 110,PO 115& PO 120 CODES Mean on a Toyota Camry 2000 model sedan car?


what engine, what size. that is first question.
misfire, map ,maf, iat, ect,tps and cat fail and low coolant temps.
very odd mix there. did you pull connections, key on???????

it means they all fail a test.
DIY? or just curious?

login to alldata.com
the question is , which is the most important.
all are cept 420, (last that, and bet goes way. later.)

reset the ECU, and see which come back.?
check all fuses.
then post codes that repeat, after fuse checks.

does the engine get fully hot running, 180F minimum?

Nov 27, 2013 | 2000 Toyota Camry

1 Answer

Why is the code of po 106 coming up i have a dodge stratus 1997


Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem fix this then you can remove the code

Jan 12, 2013 | 1997 Dodge Stratus

1 Answer

Po316, po 300, po301, po305 2004 ford freestar


These codes are making me lean towards the ignition coil pack.My stepson's 2001 Sable 3.0 v6 had one cylinder misfiring(5-code P0305),which shares a coil with cylinder 1(code P0301).I diagnosed it by trading wire 1 and 5 at the coil,and the code changed to P0301.You have codes for the two cylinders on the same coil,so this is most likely it.(these codes would also trigger P0300(Multiple Misfires Detected) and P0316(Misfire Detected First 1000 Revs)).

Oct 14, 2012 | 2004 Ford Freestar

1 Answer

Po 300 po 302 po305 just cumup on the daughters ride


these indicate a misfire on cylinders 2 and 5 the code 300 is random misfire.does the car need a tune-up plug,wires, the fuel injection system need cleaning,also there could be a intake vacuum leak with the intake gasket leaking causing the misfire near these cylinders.

Apr 10, 2011 | 2000 Chrysler Concorde

1 Answer

Just got car dont know what codes mean


po 300 is multible missfire p1684 is battery interrupted or disconectedat some point. if it runs bad have your cam sensor checked.!!

Apr 22, 2009 | 1999 Dodge Intrepid

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