[RamPA]

Hey all, hoping someone can help assist me in triage.

Fully stock, 182k miles.

My truck is hitting 2000 RPM just to get going. Sounds like it is way over doing something. For example, just backing down the driveway at 10mph, it hits 2000 RPM.

Other than that, it shifts smoothly, and once I hit 45 ish it drops to 1500 and seems to be normal sounding and accelerates fine up to 80mph where I have maxxed it.

All fuses seem fine, I just replaced MAF sensor as well.
Fully removed/soaked/cleaned EGR cooler, EGR valve, Exhaust tube as well as cleaned the exhaust port and sensor.

Only code I am getting is P2BAC (which is odd since it is purely an informational code that should be accompanied by the codes causing the issue). From time to time I get fuel rail pressure sensor, but it shuts off by itself without me clearing it.

I am not very mechanically inclined, so not sure what the noise is I am hearing - it could be over revving (higher RPMs), but it also sounds like some big fan.

It idles and sounds great at 715rpm and the radiator fan is operating fine.

Any thoughts on next steps greatly apprecaited.

(I was thinking to have the dealer do the latest flash?)

 

[GTyankee]

The P2BAC code differs from many other codes in that it is an information only code. It is not meant to be diagnosed but to make you aware that another problem exists and the exhaust gas recirculation (EGR) system has been deactivated.
A P2BAC should always be accompanied by other exhaust or EGR related codes.

When this code is stored, it means that the PCM has detected a level of nitrogen oxide (NOx) that exceeds a programmed limit. This detection may have taken place in the NOx trap or the diesel particulate filter (DPF). It may also be due to a defective DPF pressure sensor or NOx sensor.

As an added note: Some diesel powered 2007 through 2012 Dodge and Ram trucks are equipped with catalytic converters and oxygen (O2) sensors. These vehicles have proven particularly vulnerable to these types of codes. In these vehicles, the P2BAC usually accompanies an O2 sensor code. Diagnose and repair the O2 sensor code and the P2BAC will literally disappear.

Read more at: https://www.obd-codes.com/p2bac
Copyright OBD-Codes.com

 

[GearHd6]

Sounds like a junk torque converter to me. Once the the lockup clutch in the converter locks it sounds normal. Might be worth bringing it to a transmission shop.

 

[RamPA]

Fan clutch fixed it!

$580 replacement of the clutch fan did the trick.

Now, at 10 years and 185k miles, this is all that has genuinely failed on me mechanically. Quite happy with that.

Other things that have failed:
TPMS control module, water pump, a few seals here and there

Not bad!

 

[GearHd6]

A clutch fan made your RPM's increase? I'm assuming the RPM was always that high but with all the wind noise from the bad fan clutch it made you think the RPM was higher than normal.

 

[RamPA]

A clutch fan made your RPM's increase? I'm assuming the RPM was always that high but with all the wind noise from the bad fan clutch it made you think the RPM was higher than normal.

Yas! I mean I never noted the RPM when I didn't have the noise. It is still the same RPMs, but the noise is gone. The 2000RPM at 10mph in reverse is actually on point. I just didn't know or think that with the noise of what seemed like excessive RPMs.

The clutch fan was totally seized up and here are the symptoms
-Excessively loud cooling fans.
-Decrease in power, acceleration, and fuel efficiency.
-Overheating

So the noise was likely fans and not the engine. I did NOT experience over heating, but also didn't drive it much...especially since last week I just picked up a 2019 RAM 1500 5.7 Hemi Warlock

BUT GLAD to have my Cummins back

 

[ARahberg]

The P2BAC code differs from many other codes in that it is an information only code. It is not meant to be diagnosed but to make you aware that another problem exists and the exhaust gas recirculation (EGR) system has been deactivated.
A P2BAC should always be accompanied by other exhaust or EGR related codes.

When this code is stored, it means that the PCM has detected a level of nitrogen oxide (NOx) that exceeds a programmed limit. This detection may have taken place in the NOx trap or the diesel particulate filter (DPF). It may also be due to a defective DPF pressure sensor or NOx sensor.

As an added note: Some diesel powered 2007 through 2012 Dodge and Ram trucks are equipped with catalytic converters and oxygen (O2) sensors. These vehicles have proven particularly vulnerable to these types of codes. In these vehicles, the P2BAC usually accompanies an O2 sensor code. Diagnose and repair the O2 sensor code and the P2BAC will literally disappear.

Read more at: P2BAC NOx Exceedance - Deactivation of EGR
Copyright OBD-Codes.com

Hoping for a little help on this, considering its a couple years old. Can't get a solid answer from any mechanic.

I got the p2bac code with the following codes
P1507 (crank case filter restriction) ordered a new filter and its at the interval to replace. (ive read that its just a service interval code and it happened at 60k as well)
Uniform 010C code, lost communication with turbo. (going the check the wiring and a fuse as i've read and see if that does the trick)

Any insight?

I literally have a brand new transmission at 150k (relieved I got the lifetime powertrain warranty, Saved me $6 grand)
2016 Ram 2500 6.7 160k miles

 

[hobbsvictor5]

Code p1C7O