P0300 Toyota Code - Random Cylinder Misfire Condition

2001 4runner p0300 code. Starts fine and idles fine. Once acceleration hits ~1800 rpm, it starts hesitating with intermittent acceleration and power is hindered. Once it is up to the wanted speed it is fine, but will do the same thing if you try to accelerate again. I have changed the spark plugs, the wires, and the fuel filter. It seems like it is being starved of fuel when accelerating.

Either the engine is starving for fuel or there is an intake leak. At this point the next step is to connect a fuel pressure gauge and check the fuel pressure at high RPM.

Hello I have a 00 toyota tacoma 2.4 ..obd2 codes p0300 p0301 to p0304 I changed the spark plugs coils and fuel filter I checked the fuel compression is 40 psi and the engine compression is 120 psi all
Can you help me please

Next step is to check for intake leaks. Unfortunately there are many things that could cause those codes. Also check the EGR valve.

I have the same problem. How was your problem fixed?

What model and year is your Toyota? There are many things that can cause the P0300 code. You could start by replacing the spark plugs.

Hi
Have a 2002 Toyota 2wd/4cyl Tacoma Prerunner

First I had a p0300.. Installed NEW plugs..still p0300...switched #3 & #1 coils
then had a p0303 test AFTER switching the #3 coil with the #1..so coil #3 was now in the #1 position and seems to be ok. Reading is stillp0303
Had a Leak down & compression test for P0303 ...here are the readings
Cylinder #3 compression 110PSI. Cylynder #1 compression 135PSI, Cylinder #3 leakdown failed 85% for intake valve
I am now told I need a valve job,(850.00 to 1250.00) but up above in THIS article it lists other things BUT NOT valves.
Also we had Bosch (good ones) plugs put in, by not the same mechanic. Now I'm told they are NOT the best for Japanese trucks. Are NGK or Denso the best or is Bosch OK?

PLEASE help as I am an older single woman who needs some advice.

Thanks in advance

You should get another opinion. Your Tacoma may not need a valve job, but a valve adjustment (Re-Shimmied Valve Clarence). Valve adjustment is not listed because is one of the least possible cause of a P0300 and it's also combine with a engine noise.

I have a 2000 Tundra w 4.7 V8. It shows P0300 and P0441 codes. I got this info after we had installed a new fuel pump, timing belt, water pump and new spark plugs. Prior to having access to a diagnostic tool. Now it will not run but for very short periods and appears to have water in the exhaust but we cannot find any other indications such as water in the oil or pressure in the cooling system. Thoughts?

Some water in the exhaust system it's normal. It's just condensation. Water pump will not cause that problem.

The next step is to check if you have fuel pressure at the engine.
My guess is that either the the fuel pump or the timing belt was not properly installed.

I have an 01 celica that has the P0300, p0301, p0302,p0303 and p0304. So all of them are misfiring. I have changed the spark plugs, head gasket, replaced a broken hose and replaced the fuel pump. I have no idea what to do next. Please help.

Unfortunately there are many things that could cause those codes. The next step is to check the crankshaft and camshaft position sensors. Besides the codes, do you have any other problems?

I have a 1997 4runner 3.4 6cyl, ive been having a problem lately were the fuel pump would cut fuel at 4k RPM (sounds like rev limiter). I didnt have any check engine lights or codes, sometimes it would just turn off for no reason. i stopped driving it for a week and when i started it i finally got a check engine light, when i checked the codes i got; P0300 P0301 P0302 P0303 P0304 P0305 P0306 could you please help me out

First thing you need to check is fuel pressure. If you have low or no fuel pressure, the engine will cut off and the codes will set. Fixing the fuel pump should take care of the codes.

I'll do that, Thank you very much!

Hello autocodes
How to fix the error code ( P0302 P0300 P1603 P1605) getting white smoke while starting + engine shivering/vibrating .Much appreciated if u could suggest some idea to fix my toyota etios . thanks in advance - MR Motors

There are many things that could cause those codes. You could start by changing the spark plugs and a fuel injector cleaner.

I have 2005 Tacoma 6 cyl. 140K miles. Recently replaced all spark plugs and then all ignition coils. Engine light was off for a couple of weeks then came back on once again. Codes P0300 and P0305 now reading and I don't know what to do. Any help with the P0300 code would be great. I'm sure the repair shop will fix the 0305 code, since coils were replaced just weeks ago.

Try swapping the #5 coil with #3 coil to see if the code follows the coil. If you get the same code, then the problem could be the fuel injector.

I have a 2001 Toyota Celica Gt 1.8. It has 240,000kms on the odometer. I am getting a P0300 code. I replaced the spark plugs. I turned off the check engine light. Then the CEL came back on. It was the P0300. What should I do next?

Help me out with this problem toyota sienna 2002 or 2003 I got oxygen sensor bank 1 low voltage but VSC trac off light is on down I after I star the Engine and check Engine light pls what can I do to off the 2 night

2005 v6 tacoma p0300 code the only thing I can notice other than the code showing up is after the vehicle is very cold I mean sit over night cold. When I start up you can feel the truck shudder a bit bout 5 -10 seconds doesn't do it anymore and wont do it again until next day . sometimes wont do it all. Plugs are only a few month's old. Thanks for any help.

You may have a leaking head gasket or leaking injectors. Have you notice any loose of coolant? does the exhaust fumes smell like gas (during cold start)?

Hello, have a 2000 celica 1.8l 1ZZ-FE giving misfire codes for various cylinders in addition to multiple misfires detected, and can feel runs a little rough/slight hesitation. Spark plugs are about a year old and were recently cleaned up and re-gapped. I don't believe the coils are the issue, (1 on cyl 3 did fail, displayed code for cyl 3 coil circuit fault, and car wouldn't run.. does computer kill engine if detects bad coil?), or spark plugs. I'm curious about injector o-rings, I slightly wiggled an injector once and noticed slight mist, and/or crankshaft/camshaft position sensors. I've searched everywhere for vacuum leaks, cleaned MAF sensor, checked for bad gaskets, etc.. only codes it throws are cylinder misfires detected. A friend said he had same issue and was caused by bad crankshaft position sensor and only gave trouble codes for misfires. So any help would be appreciated!
Thanks!

Ever resolve your issue? If so, what was cause? We have 2000 celica 1zz-fe, giving multiple cylinder misfire codes.. plugs seem fine, coils as well..

Unfortunately, there are many things that can trigger the P0300 and the single cylinder misfire codes. From what I read, I doubt there is a problem with Engine Control Module, the problem sounds more like a mechanical issue. Have you checked the gas? I have seen many vehicles with the same symptoms and bad gas was the problem.

Hello,
I drive a 2012 Toyota Camry SE, and recently there is a long
crank before car ignition. But today my car would not even start up. I
asked my friend to lend me a diagnostic tool, and only 2 DTC codes were
found and they are OEM Enhanced P0300 and P1604 combined. I looked up
the problem and it sounded like it could be anything, and I am no
technician myself. But would these two codes combined indicate a
specific problem I could tackle first? Thank you so so much for your
help!

The P1604 code is stored if the engine does not start or continues to crank without starting, so whatever is setting the P0300 code is causing the no start problem, and that sets the P1604 code.

The problem that is setting the P0300 code is affecting all the cylinders. Since is rare that all the spark plugs, ignition coils and fuel injectors fail at the same time, you can discard that.

Have you done any repairs lately? how is the battery charge? when was the last time you change the engine oil and air filter?

Thank you so so much for the quick reply!

Last time I changed engine oil was 3-4K miles ago. Whereas repairs, I had my front bumper replaced maybe less than 6 months ago? The repairs were done at a body shop. As to battery charge, I am unsure. Last night I checked, the car does not start, but the clock and some lights were still on. However I do notice the lights were really dimmed though. I’m not sure if I answered all your questions correctly.

I would start by checking the battery charge or use a battery jumper to try starting the engine. Sounds like low battery charge, which could set both codes.

Hahaha thank you so much!! You were right, it was a really bad battery my friend said. He said it wouldn’t hold the change probably a bad cell. Then he checked my spark plugs and found that they were really corroded, so we swapped all those, and now it turns on like a charm! Thank you so much!!

Thank you for sharing!!

Hello,
My husband has a 2000 Toyota Sienna. Getting codes P0302, P0304,P0306, P0300, P0172, P0141. Plugs are only 6 months old, ignition coils are brand new. Any suggestions? Thank you

Hello
Did the engine overheated? is the engine running rough?
If the engine is running rough, then the next step is to perform a compression test to check for blown head gasket.

2011 Toyota Tacoma 2.7 liter 4 with 150,000 miles. P0300 misfire 1 and 2 cylinders. Stumbles runs rough on cold start rev it a little and it clears up and runs good the rest of the day. 400 miles on new plugs.

2011 Toyota Tacoma 2.7 liter 150,00 miles. P0300 misfire 1&2 cylinders. New plugs new gas cap. Runs rough on cold start but then smooths out and runs great the rest of the day after revving the motor a little.

Sounds like your Tacoma may have leaking fuel injectors. Did you notice any excessive black smog at startups?

same as my 2015 highlander. did you find what the cause was?

Toneey

did you ever find out? or did you solve he problem already?

I have a 2005 toyota 4 runner. Codes p0174, p0300 and p0302 popped up this morning. I know I have to replace my catalytic converter (front passenger from previous codes) would these codes be from that?

Start by replacing the spark plugs and use high octane gas for a couple of weeks. If the P0302 code persists, you will also have to replace the ignition coil #2

My gf has a 2002 Camry , throwing P0300 . multiple misfire then , 303 304 305 , an 1311 I think she something but idle is very rough , also when I hook up my scanner my scanner rpm reads say 2k which is correct just by knowing compared to what the tach is reading 3k like 1000 rpms faster than what it's really doing , put it in drive and you have to rev the roms to like close to 3 k then it will slowly take off , all new plugs TPS is reading about 14-16% with the rpms per my scanner between 648-813 , idle relearn possibly ? The only thing I have skipped right over car fan fine before plugs an battery , tanks in advanced

I don't know why the tach is not reading the correct RPM. Since you have already the spark plugs, my only suggestion is to perform a compression test to check for a possible blown head gasket.

hi everybody
My land cruiser Vxr 2013 engine overhauling after all spark plug injector cleaning 8coils change after engine random misfire left side 4 cylinders misfire any suggestions?

My 2008 Tundra has a PO300 multiple misfire code, it just feels heavy, the engine doesn't respond strongly.