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FCA Fuel control actuator, it has the same meaning as FPR. If debris is found (Metal) you will need to replace or clean everything form fuel tank to Injectors...$$$$. If no debris found its likely your electronic LV. VM 3.0 is not the power plant to own if you're NOT (HPCR) Diesel seasoned, It's...

The FCA is easily accessible takes about 5 minutes, You need to remove and inspect the FCA, that code at times is triggered by contamination (Metal) just prior to the CP4 Grenades itself $$$$$

That worked until thermo-couplers are used to detect the EGR exhaust temps. VM 3.0 has one just after ERG Valve, thus when the Temps don't measure up, then it triggers codes CEL.

Is this used for DD? if so buy gas. It's a Hero/Zero engine, it will soon be completely out of production the value will drop and the cost of repairs will skyrocket in long term ownership.

You need Alfa and OBDII to place the vehicle in Stationary De-soot.. Did you do any research on VM 3.0 before purchase? IMO in DD use your problems will continue... this is NOT the engine to relied on for DD use..If you take this problem to dealer expect $2K+ bill.

It's a hyperbole, Some promote that using any other ratio than 33/67 the DEF system will self-destruct or the environment will cease to allow life to co-exist.

OK... just say close to 22%....... Did you get the self destruct code or rationale code?

Here's the video.

John 2017 and earlier Have a common sensor ,it's only capable of detecting Urea/Nitrogen. So you can run ratio's to 5% Urea/Nitrogen to 95% Dist/DIO water. I ran My 2015, down to that level its entire life I owned My 2015 4.25 Years. 2018+ have quality sensor so 22%+ is needed... 1000s of DEF...

Unfortunately it's probably not the end of your problems...VM 3.0 COC..are problematic... It's commonly known as a hero or zero engine...

You can until the message displays to service E?

You will also need the SGM bypass, 2018+ Rams.

No on the driving, Yes on the Tool ALFA and you will need the OBDII device /key . https://www.alfaobd.com/

The bar is so Low that a Motor that has 80K is considered good, Yep it's a blessing! it's been OK IMO, NO VM 3.0 is issue free, the settlement, ALL the recalls, alone disqualified the VM 3.0 from claiming its issue free.

FCA own admission back in 2016, 10,000s of 3.0 have puke over the last 9 Years, it simply a Hero or Zero....

I don't have the time to confirm this, So look into it. if the CEL is triggered it may NOT passive regen, then the Count down message will display (likely) itself on your trip (EVIC)

2 gallons distilled water to 1 gallon DEF. IF SOME SOME ODD reason you trigger a rational code just at al little more DEF and drive a few miles it will dissappear.

ALL DEF FREEZES AT 12F...the system is designed to start thawing at 26F ..so No Problem in any of my Diesels. MANY ARE running that ratio..2018 + needs 2 Gallons DEF to 1 Gallon distilled water..

Yes...MN winter..