Tons of errors

[FordTechOne]

Depending on the DTCs that are setting, they shouldn't even be attempting to diagnose it with the 37" tires on it. That is a significant variable in the braking/stability control algorithms that are calibrated around factory components. My best suggestion is to measure the circumference of your 37" tires. It only takes a 1" variance in circumference between one tire and another to set DTCs, and I've seen it plenty of times.

 

[sherwood]

Depending on the DTCs that are setting, they shouldn't even be attempting to diagnose it with the 37" tires on it. That is a significant variable in the braking/stability control algorithms that are calibrated around factory components. My best suggestion is to measure the circumference of your 37" tires. It only takes a 1" variance in circumference between one tire and another to set DTCs, and I've seen it plenty of times.

Thanks! That’s programmable or need to put back 35s? Been on 37s for a few months with no issues. They have been saying communication errors.

 

[FordTechOne]

Thanks! That’s programmable or need to put back 35s? Been on 37s for a few months with no issues. They have been saying communication errors.

I am not aware of any aftermarket calibrations that can adjust the ABS and stability control parameters for larger tires. I would still recommend verifying tire circumference of each tire; even a small variation can cause intermittent issues. Communication issues can be loss of communication between modules or invalid data sent between modules, just depends on which DTCs they’re getting. Is everything else stock besides the tires?

 

[jabroni619]

Those of you with rodent issues need to invest in a fig tree... Won't get rid of the rodents but they'd much rather chew on those than your wiring. We have quite a few squirrels where I live and thankfully they have spared my truck for the most part. I say "for the most part" because they do tend to have a picnic under the hood and leave their droppings around the battery tray and engine cover.

 

[Droid]

It continues to amaze me that sensor/data-input faults in new vehicles aren't correctly logged by the software systems. This is not a Ford thing, it seems like it's every manufacturer. There was a fault condition that tripped these subsystems to stop functioning because some requirement could no longer be met. Y-T-F isn't the failed requirement logged by the system?

All anyone ever seems to get when a failure occurs is a list of subsystems that no longer can function as a result.

Or is the greater problem simply that the service personnel aren't correctly trained to retrieve this data? Or aren't given/allowed the tools to retrieve it?

 

[sherwood]

I am not aware of any aftermarket calibrations that can adjust the ABS and stability control parameters for larger tires. I would still recommend verifying tire circumference of each tire; even a small variation can cause intermittent issues. Communication issues can be loss of communication between modules or invalid data sent between modules, just depends on which DTCs they’re getting. Is everything else stock besides the tires?

I added Geiser springs up front, Deavers in the rear a few years ago with no issues. More recently (6 months ago) I did ADD front bumper with lights which required me to move ACC sensor into grill which caused dealership concern but everything is plugged in and working.

 

[FordTechOne]

It continues to amaze me that sensor/data-input faults in new vehicles aren't correctly logged by the software systems. This is not a Ford thing, it seems like it's every manufacturer. There was a fault condition that tripped these subsystems to stop functioning because some requirement could no longer be met. Y-T-F isn't the failed requirement logged by the system?

All anyone ever seems to get when a failure occurs is a list of subsystems that no longer can function as a result.

Or is the greater problem simply that the service personnel aren't correctly trained to retrieve this data? Or aren't given/allowed the tools to retrieve it?

When a fault occurs, applicable DTCs are set and stored in every affected module. If a module sends a CAN message out and does not get a confirmation from the receiving module, it will set a loss of communication DTC against that module. Same with invalid data; if a module receives a bad input (wheel speed, steering angle, etc) it will not only set a DTC for the fault, but it will send out the data to other modules which will then set invalid data DTCs against the originating module. These DTCs will remain present for multiple ignition cycles even if the fault stops occurring. Many DTCs will also set freeze frame data that can be retrieved. If a network fault is currently present, there are published diagnostics to determine and isolate root cause. With intermittent network concerns, the paper trail of stored DTCs will often lead to the root cause, provided the technician has the skills to interpret the data. In cases where an entire bus is inoperative, the fault may need to be duplicated in order to find root cause.

 

[REMIX]

Those of you with rodent issues need to invest in a fig tree... Won't get rid of the rodents but they'd much rather chew on those than your wiring. We have quite a few squirrels where I live and thankfully they have spared my truck for the most part. I say "for the most part" because they do tend to have a picnic under the hood and leave their droppings around the battery tray and engine cover.

Cayenne pepper sprinkled around the engine compartment works pretty well.

 

[sherwood]

FINALLY got my truck back after being at the dealership for almost 6 weeks! They did 2 things, replaced ABS Module (supposedly fixed some of the issues) then replaced FCIM (Front Control Interface Module) which stopped codes. Lets hope that did it!!!!
Just FYI, they had another 2018 come in that was having same codes so hopefully this post will help someone else having same issues. Fingers crossed it's fixed!
Last note, this all happened at 37,*** miles so of course just out of factory warranty.

 

[sherwood]

Update: Codes are back!!!
Going back into a different dealership. Keep fingers crossed for us!