Thank You, good video.. Another simple test if wiring is good is simply putting an ohm meter (multimeter) across the two terminals on the coil to check resistance, I believe my 03 liberty is between .6 and .9 ohms across the terminals. Secondary resistance, between either connector and the coil terminal that clips to the spark plug is between 6000 and 9000 ohms, an open circuit or too high or low ohms would indicate bad coil. No excuses for not owning a Multimeter, inexpensive ones are cheaper than lunch at a drive thru.

Working on cars for 20 years , in Arizona the heat dries most wires. In case of misfire & bad circuit , most time it is all at ones or at least 2 thing . spark plugs , wire , coils , and injectors. Replace part & or Cleaning wires connector is rarely needed

Excellent time and cost saving advice! Much appreciated.

Thanks man swapped and cleaned the connection points and cars good as new you saved me a ton appreciate you

thanks for making this . I have the same issue on cylinder #4 in my 06 commander with a 4.7 engine and didn't know the connection point is the negative connection. I brought a new coil but i'll clean the post to see if the codes go away. please make more videos. :)

You're a godsend, going to diagnose just as you did right now!

Did exactly what was said in video & fixed my problem. Awesome ! Thank u

A po206 has nothing to do with the coils. The po206 sets when the pcm sees a change in voltage at the injector rather it be in the pigtail or the injector itself so I’m not understanding how swapping coils had anything to do with it unless there was a bad connection that you somehow bumped and fixed when swapping coils.

Thx for the info. I have the same code for my 2012 Explorer. 3.5L V6 I’ll check to see if the connection is good. Cheers

Sir, I need that stick that youre holding right now! Maybe it will solve this same issue im dealing with for a client. New coils, plugs and an Injection cleaning and it came right back. It has to be that stick that youre holding. Thanks for the info

I swapped coil and injector and still getting p0201

thank you so much for making this video

Great video !!!

I have a problem with. A 2006 Pontiac grand prix with this code p0203 I check all my wires and looking good. And I check my fuse injector and good but when I open the switch the current goes And I closes the switch the current come back. I will like to know if I have bad switch or bad computer’

update, replacing the throttle body sensor and air intake control valve fixed my problem

My 05 chrysler the ecu.... after ALOT of testing.. cylinder 3 & 6 not firing injectors to click..

I need someone help, I have a 2012 jeep patriot, it has a p0304 code for cylinder and injectors #4 and i swap the injector and cylinder to #1 and I still have the same code p0304

Great vid and informative !

hello i have a problem with my jeep 5.7 hemi, the problem is with the injector 1 no pulse malfunction, please how can you help me fix it as a problem.

So here's the thing. I got cyl3 misfire. replaced all plugs and coil 3. now it's throwing a cyl2 misfire.

Are those original parts still? Or have they been replaced at all? Thanks. Very informative video.

2005 Cherokee liberty. Saying codes for 3 different injectors here. Could it be the same thing?

that coil does not ground thru that bolt

Thank you!

Thanks

Your injectors gets power from the pcm not the ignition coils....your injectors work like a solenoid when it fails it either isn't getting power or it loses resistance. Your codes went away because you disconnected grounds.....stop giving mechanical advice if you don't know what you are talking about especially when you don't know what things are called...signed a real mechanic

Shouldn't e coils and the injectors have different p000 codes

I currently have a p0203 cylinder 3 injector stuck open circuit.. 2002 Dodge ram 4.7 1500 w/4wheel drive. It does nothing different to unplug the injector on cylinder 3and or spark plug I've changed injector swapped and changed it afterwards it didn't work either way then changed spark plugs and coil packs still said I have a code and running poorly it must be a ground somewhere? I have tried everything I've known or found online or in person asking friends anyone help? (Also you only have to take one side of the fuel rail off at a time as long as you have the first 2 coil pack and 4 injectors on one side you're working on and it will spin upwards 😊 )

P206 / P306 : The 200 code would be a circuit meaning most likely the coil. The 300 would be mechanical such as the spark plug or the fuel injector. I think you said you had a P206 at the beginning of the video so you should have realized that it was the coil from the beginning?

F'n rights man!

Hi thanks for the vid it was very informative, I'm having a similar issue with my caravan 05. It's giving codes p0202- 04. I switched those two injectors I also switched the wire harness it's still giving off the same two codes. I'm wondering if I may have to purchase a new wire harness which is quite expensive.

hey i have the same codes but for like cylinders 2, 5, and 7 on my 4.7 but i just replaced all the coils and spark plugs brand new a bit ago any ideas anyone?

What do we clean it with? Electric cleaner??

I have the same car. Same year 3.7 liter. I'm not getting any codes but sometimes my engine will idle by itself while my foot is on the break at a light and it will slightly feel like the engine wants to shake. Just changed the air intake control valve and the throttle body sensor? Hopefully maybe this is the problem?

This entire video is completely wrong for anyone who doesn’t know

My code on a 2006 Jeep Commander with a 3.7 L engine is P306 which is number six cylinder misfire changed spark plug changed coil pack still running rough and sounds like a spark knock coming from that cylinder any suggestions besides changing injector in that cylinder?

I have the p0206 and p0306

Are you sure it was P206 code? 206 is for cyl 6 injector circuit malfunction and code 306 is for general misfire on cyl 6. What you described and what fixed it, sounds like it would have been code p0206......mine has both codes so I'm trying to get it figured out.

p0206 is an open circuit on injector 6.... it means the computer is not reading voltage/or voltage change through injector 6... p0306 is what you're referring too...

That's why jeeps are trash

Po206 has nothing to do with a coil...po306 does

I swapped coil and injector and still getting p0201