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CHECK ENGINE LIGHT FLASHING.... CODE 300&301!! CHANGED PLUGS AND WIRES NO CHANGE

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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chrischronic
  • 235 Answers

SOURCE: 03 windstar rough idle working bad,worse in the rain

ford has a technical service bullitin out on this vehicle for the intake gaskets leaking causing a vacum leak that set codes 171 174. the solution is to have the intake manifold gaskets replaced . call your local ford dealer and see what thay can tell you about this bullitin.

Posted on May 07, 2009

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polarcycle
  • 1392 Answers

SOURCE: check engine light codes and troubleshooting

Sounds like you have a vacuum leak for the lean code and the misfires. I don't see a 473 code in my manual, but have a 463. The 463 is for the fuel level sensor open or voltage high.

Posted on Jun 02, 2009

autotherapis
  • 501 Answers

SOURCE: Service engine soon light is flashing

When the light comes on without flashing, it just means an emissions problem, when it starts to flash it has become more serious. I suspect that there was an error putting the plugs and or wires. That computer can determine if there is a misfire and it will put out a P040X, code where X represents which cylinder is the problem. This will help you not have to take each one apart. If there are more than one, check each number.

Ex. P0401 means there is misfire on cylinder number 1

P0400 is a random misfire detected.

If you take it to an Advance or Autozone they will usually scan if for free.

By the way, if you used cheap plugs instead of platinum plugs that could do it too.

Hope this helps.

Posted on Nov 25, 2009

zaldyboy01
  • 293 Answers

SOURCE: Check engine light

Reset the computer.

Posted on Mar 06, 2010

  • 2 Answers

SOURCE: 2005 chevy aveo Check engine and hold light comes on only over 60

I've become SO FAMILIAR with this problem on my own Chevy Optra. The first time it happened, I took it in to my dealer. It cost me over $100 and I SWORE it would never cost me that again. It really IS the fuel system. (Sticking with Shell's "detergent" gas doesn't help!) Simple solution is to add a bottle of fuel SYSTEM cleaner (not just the fuel injector) and the FIRST sign of trouble or with each oil change. No more problems !! "Live and learn and pass it on !"

Posted on Mar 27, 2011

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1 Answer

How do I fix a check engine light code 300, 301, and 302 on a 2000 Toyota Avalon XLS?


Not spark plugs

It is an ignition problem or many other things,
that can cause a misfire

Google your OBD Codes & see what causes them

Really need vehicle experience & professional test equip,
to look at vehicle data & be able to component test

Changing out good parts, won't help you find anything

Sep 30, 2014 | 2000 Toyota Avalon

1 Answer

Need help with codes 300, 301, 306 and 171


Well code 300 is a random miss, 301 is for cylinder 1 and 306 is for cylinder 6. Code 171 is saying the fuel mixture on bank one is too lean. And that could cause the other codes.
Have you checked fuel pressure and the filter ?

Jan 31, 2014 | 1999 Toyota 4Runner

1 Answer

Obd 2 code 300


the codes need to be cleared also did you replace plug wires or coil packs? codes need to be erased every time a repair is made wiring connections should be checked as well

Oct 21, 2012 | Chevrolet TrailBlazer Cars & Trucks

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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

What does the check engine flashing mean on a 99 vw bettle?


typically any flashing light is a misfire, which could create cat convertor failure.
codes will be something with 300 via 301 cyl 1, 302 cyl 2 etc. Many things can
cause this via plugs, wires, coolant temp sensor, maf and so on. Suggest getting
it checked out asap.

Nov 09, 2011 | 1999 Volkswagen Beetle

1 Answer

I have a 2002 toyota celica gts, and just recently the check engine light came on. I had my friend read the code, and it came up as 301, misfire in cylinder 1. To try and diagnose the problem, I switched...


rotate the wires swap #1 with the "bad" one if you can, before you spend money on a new set of wires. This problem usually is caused by: either a broken sparkplug
carbon wire coreor, a mis-alined reluctor.

Jul 29, 2010 | 2002 Toyota Celica

1 Answer

I had this code PO300, P0302, and p0301. I changed my spark plugs but engine wont't start.I'll like also to know the probable causes of misfiring too,please.


300 is multiple cylinders miss fire, 301, 302 you have cylinder 1 and 2 miss fire. check your wires and fuel injectors on those cylinder

Feb 27, 2010 | 1992 Lexus Es 300

1 Answer

Codes 1128 300 301 302 303 304 on 2000 accent'' i took my car to auto zone those are the codes. i have replaced plugs, wires, coil and mass air flow sencer and fuel filter could it be the O2 sencer? when i...


Concentrate on code 1128, which is basically telling you the engine has been running too lean for a while now, so that explains the misfire codes, which is the rest of them. The main causes of those symptoms is usually a vacuum leak, plugged fuel filter (which you've already changed) exhaust leak, Canister purge system malfunction, or a weak fuel pump. By sounds of yours I'd concentrate on vacuum leak & canister purge system. If you have access to a fuel pressure gauge, check fuel pressure just to be sure, but I'm thinking canister purge circuit.

Jul 05, 2009 | 2000 Hyundai Accent

1 Answer

Check engine light codes and troubleshooting


Sounds like you have a vacuum leak for the lean code and the misfires. I don't see a 473 code in my manual, but have a 463. The 463 is for the fuel level sensor open or voltage high.

Jun 01, 2009 | 1998 Jeep Wrangler

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