P219B

[Ana1Ravager]

Had Engine Misfire Cyl 6 P0306(?) and P219B. Changed spark plugs and now only have P219B.

According to posts and the internet here there’s quite a few different options. I’m trying to lean toward the o2 sensors though. I imagine I replace the Bank 2 sensor, but I’m not sure.

So I used a scanner. I drove the truck on the highway so it was well warmed up before I took any measurements.

For some reason, I only did Bank 2 for the live graph. My short term fuel alternated from -2.34% to I think .75% the first 50 seconds. Then jumped and alternated from 11.72% to 8.6%. My long term fuel stayed steady at 7.81%. Is 11.72% far from normal and considered bad?

I also measured the voltage using the scanner.

Sensor 1 Bank 1(S1B1) - 0.73V
S2B1 - 0.71V
S1B2 - 0.31V
S2B2 - 0.86V

I’ll also add the fuel trims that are with the voltage page.

S1B1 - STFT - -11.72%
S2B1 - STFT - N/A%
S1B2 - STFT - -5.47%
S2B2 - STFT - N/A%

I’ve been trying to figure out what the numbers mean using that obd-codes site that’s mentioned here when P219B gets brought up but I’m not getting it.

Other than that code. The truck runs great with no issues. No issues starting, no hesitations or trouble getting up to speed or passing anyone.

 

[Ana1Ravager]

Oh I thought the site would say my info. It’s for a 2016 1500 with the 3.6

 

[Ana1Ravager]

After consulting with alcohol, I believe the o2 sensors are possibly fine. The voltages are within limits, and STFTs are balancing themselves.

-11.72% and 11.72% are not good values as they should be at 0% BUT they do equal 0% when added together.

My next goal is to figure out what the thing on top of the engine is called that connects to the throttle body and air filter box. I’m not sure what it does yet but it is cracked and I probably need to verify I connected the hoses correctly.

 

[SitKneelBend]

After consulting with alcohol, I believe the o2 sensors are possibly fine. The voltages are within limits, and STFTs are balancing themselves.

-11.72% and 11.72% are not good values as they should be at 0% BUT they do equal 0% when added together.

My next goal is to figure out what the thing on top of the engine is called that connects to the throttle body and air filter box. I’m not sure what it does yet but it is cracked and I probably need to verify I connected the hoses correctly.

It's called the resonator. Have you checked the fuel injectors?

 

[Ana1Ravager]

Great news! My Cyl 6 Misfire code has returned! Now we are making some dam sense here.

I originally bought an injector to replace it but when I took the upper manifold off, I found like an entire shredded newspaper and acorns over Cyl 6.

Taking that stuff out and replacing the spark plugs didn’t fix the misfire initially but the misfire code did go away for some reason until today.

I also remember my Cyl 2 spark plug (The one closest to the battery) having a bit of oil on it. So since I’m going back into the engine, I might as well replace most of the seals in there as well.

 

[Ana1Ravager]

It's called the resonator. Have you checked the fuel injectors?

Without removing them all, I’m honestly not too sure how. Idk if the screwdriver stethoscope trick works seeing as how my problem injector side has the manifold on top. I’m not sure if it would be fine to run the engine with the manifold off long enough to try the screwdriver trick.

Also I think it’s called the air cleaner resonator. So thank you for that. Mine has a rather decent crack right down the middle from the rear eng to fwd. I can’t imagine that’s helping anything

 

[SitKneelBend]

Without removing them all, I’m honestly not too sure how. Idk if the screwdriver stethoscope trick works seeing as how my problem injector side has the manifold on top. I’m not sure if it would be fine to run the engine with the manifold off long enough to try the screwdriver trick.

Also I think it’s called the air cleaner resonator. So thank you for that. Mine has a rather decent crack right down the middle from the rear eng to fwd. I can’t imagine that’s helping anything

Just cylinder 6. Your going to simply check the resistance. Then compare it to a non-misfire cylinder.

 

[Ana1Ravager]

So I checked 1,3,5 injectors with each being 12.7. My cheap multimeter probes came apart after the 5th one so that was kinda hot.

I went ahead and pulled the 6th injector and used what little wire was left to measure 33.7. Going to get new probes before saying that the injector is bad and replace it. Hopefully that at least fixes the P0306 misfire.

As far as the air cleaner resonator, it’s cracked starting from the 3.6 making an L shape to the back of it. I believe it’s just cosmetic though and don’t see any signs of the actual air ports cracked or damaged. So that’s good.

 

[SitKneelBend]

So I checked 1,3,5 injectors with each being 12.7. My cheap multimeter probes came apart after the 5th one so that was kinda hot.

I went ahead and pulled the 6th injector and used what little wire was left to measure 33.7. Going to get new probes before saying that the injector is bad and replace it. Hopefully that at least fixes the P0306 misfire.

As far as the air cleaner resonator, it’s cracked starting from the 3.6 making an L shape to the back of it. I believe it’s just cosmetic though and don’t see any signs of the actual air ports cracked or damaged. So that’s good.

Check this out when I had a similar problem...dealer notes attached. One time it would run but misfire, another time it had to be towed to the dealership.

2014 3.6L Misfire Cylinder 2

Hello, I am trying to help my brother diagnose a cylinder 2 misfire on his 2014 Ram 1500 3.6L. He has already replace the ignition coil on that cylinder with no improvement. I checked the number 2 injector with my PicoScope and it shows a good waveform except that it is about .365 ms shorter...

www.ramforum.com

 

[Ana1Ravager]

Sorry I had to buy new probes.

injectors 2,4,6 read 12.7,13.5, and now 12.7.

Misfire code left almost immediately.

P219B still active but from what I could see, the STFTs were looking much better and, as far as my knowledge goes, were within specs with bank 2 alternating from -3 to -7. Obviously not 0 but a win is win.

Had Oriellys clear the code and it stayed off driving through town.

I’m sure P219B will come back with a vengeance and I’ll deal with it then. Probably next week tbh lol

 

[Ana1Ravager]

Check this out when I had a similar problem...dealer notes attached. One time it would run but misfire, another time it had to be towed to the dealership.

2014 3.6L Misfire Cylinder 2

Hello, I am trying to help my brother diagnose a cylinder 2 misfire on his 2014 Ram 1500 3.6L. He has already replace the ignition coil on that cylinder with no improvement. I checked the number 2 injector with my PicoScope and it shows a good waveform except that it is about .365 ms shorter...

www.ramforum.com

That’s hilarious lmao. I’ve had that receipt saved for months. That’s how I knew my injectors should be around 12.5. I was wondering who I got that picture from.

I see you had to replace both injectors eventually. I’m sure 4 is on its way out. But as long as it keeps driving and starting fine, I’ll push it off until have all the seals and everything else to do it then. I also believe I can reach the o2 sensors without removing the wheel and liner, also a plus.

 

[SitKneelBend]

That’s hilarious lmao. I’ve had that receipt saved for months. That’s how I knew my injectors should be around 12.5. I was wondering who I got that picture from.

I see you had to replace both injectors eventually. I’m sure 4 is on its way out. But as long as it keeps driving and starting fine, I’ll push it off until have all the seals and everything else to do it then. I also believe I can reach the o2 sensors without removing the wheel and liner, also a plus.

I thought it might be helpful to "someone"...I wish all techs wrote up details like that.

 

[Ken226]

found like an entire shredded newspaper and acorns over Cyl 6.

 

[Hardracer]

Ya,....I consult with alcohol quite a bit to