DTC P160A after tire size change in tune

[VanFiveO]

It is, you probably have to cycle the ignition though to get it to take properly. I'm not sure, I'll play with it myself soon. Glad it hasn't come back since with the correct value.

Thanks.

I'll let you know if just clearing it did the trick or it throws the code again over the next few drives.

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[GR1MxREAPER]

Not sure why some people say to leave it and the car will learn? Maybe this is for very small tire or gearing changes but for big changes it does not adjust. I went from stock PP1 275/40/19 rear to 315/30/19 and it’s off 6-7 mph at 70 lol. My dealer says they can’t change it either..? I’ve tryed with forscan but for some reason I can’t get it to take. I will just have to find another dealer that has some experience. I called Ford Performance directly and they said of course it can be changed by the dealer, they also said the 2019 Ford GT350R came with that exact size rear tire so they can take that preset that is in the system and use that. Lol.. my dealer must just suck haha..

 

[involutions]

Using my procal 4 device. There is an option under diagnostics & service functions to change tire size and gearing. I press that option, click continue and enter the revolutions per mile. In my case 751 for the 285 35R19 square set up I'm running. Hope that's the right way to adjust.

Should this also work on a 2022 Mach 1? I want to change the rear end to 4.09, but don't want an aftermarket tune.

 

[WildHorse]

I’ve tryed with forscan but for some reason I can’t get it to take.

All 4 tires have to be within 4% of the AS BUILD size.

 

[Noleftist]

Not sure why some people say to leave it and the car will learn? Maybe this is for very small tire or gearing changes but for big changes it does not adjust. I went from stock PP1 275/40/19 rear to 315/30/19 and it’s off 6-7 mph at 70 lol. My dealer says they can’t change it either..? I’ve tryed with forscan but for some reason I can’t get it to take. I will just have to find another dealer that has some experience. I called Ford Performance directly and they said of course it can be changed by the dealer, they also said the 2019 Ford GT350R came with that exact size rear tire so they can take that preset that is in the system and use that. Lol.. my dealer must just suck haha..

I asked the dealers near me if the oil life monitoring system was based on conventional or blend or synthetic. They didn’t seem to know.

 

[involutions]

I asked the dealers near me if the oil life monitoring system was based on conventional or blend or synthetic. They didn’t seem to know.

I don't think they need to know much of anything except how to say, "that's normal", "can't duplicate the issue", "one of our technicians called out sick so your car will not be done until next week", and "I'm not sure"....

 

[GR1MxREAPER]

All 4 tires have to be within 4% of the AS BUILD size.

I figured it out. I ended up using forscan and speedo is perfect again.

 

[Noleftist]

I don't think they need to know much of anything except how to say, "that's normal", "can't duplicate the issue", "one of our technicians called out sick so your car will not be done until next week", and "I'm not sure"....

You work at a dealership, don’t you?

 

[WildHorse]

I figured it out. I ended up using forscan and speedo is perfect again.

What you do ?

 

[involutions]

You work at a dealership, don’t you?

With owning two Mustangs I’ve spent my fair share of time in one being lied to and blown off.

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