Has anyone with a P00AF code actually fully resolved their issue?

[rharr]

Just an update on my experience with P00AF. Twice in 400 miles I had this code come up (southern NV and central AZ). Both times with about 500lbs payload and not towing, both times pulling long (~3mi) grades at speed (~65mph). Immediate detune, CEL, service traction and throttle warnings. It felt like the wastegate was left fully open on detune. After the second time, I made a conscious effort to not let the turbo stay in high boost situations (drop to 35-45mph on longer grades, avoid cruise control, watch oil temps as an indicator of under hoods temps rising. Drove 2400 miles home over 4 days, fault has not presented again. No pending codes, no hard codes. My guess is that prolonged high EGT and turbo temps are causing an electronic fault somewhere that tells the computers that the turbo actuator is not responding appropriately, which causes the wastegate to default open in order to prevent a runaway situation.

anybody is in the desert and wants to try to replicate the issue, my two instances were:
NV: Warm springs to crystal springs, eastbound on rt375. Ambient temp 91°
AZ: i17 northbound from Camp Verde To Flagstaff, ambient temp 85°

Both times maintaining a constant 65-70mph

Factory height, factory 285/70r17, no aftermarket tunes or modifications to drivetrain whatsoever

I have made that run up i17 plenty of times, she will detune if you try to run the whole climb under high boost /high speeds. I generally run it around 70 for a bit, back off for a while and then go back to 70, watching my oil temps.

I have also removed the engine cover crap and all the sound insulation foam around the engine. I also made my ruby hood vents functional and removed the cowl seal at the back of the hood to give my engine every opportunity to dump heat where ever it can.

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[my dog Trigger]

The paper in December says turbo but was told they did not do it then. This time they did had to remove cab personally I don’t believe the teeth were missing wouldn’t that cause it to run terrible?

I correct my self the teeth wore off means actuator not working having heigh boost making even more boost causing cel

 

[alpineovernappa]

I have made that run up i17 plenty of times, she will detune if you try to run the whole climb under high boost /high speeds. I generally run it around 70 for a bit, back off for a while and then go back to 70, watching my oil temps.

I have also removed the engine cover crap and all the sound insulation foam around the engine. I also made my ruby hood vents functional and removed the cowl seal at the back of the hood to give my engine every opportunity to dump heat where ever it can.

Thanks for taking the time to post this. I’m relieved to know that I’m not the only one who has had issues on that section of road. While that is a long grade, I’m very surprised that an unloaded JTD is unable to maintain speed without detuning. I can’t imagine what it’s like for guys who regularly tow up long grades with the 3.0

 

[rharr]

Thanks for taking the time to post this. I’m relieved to know that I’m not the only one who has had issues on that section of road. While that is a long grade, I’m very surprised that an unloaded JTD is unable to maintain speed without detuning. I can’t imagine what it’s like for guys who regularly tow up long grades with the 3.0

End of the day it's a small displacement engine hitting above it's class. In order to get that level of performance out of a smaller displacement motor they turn up the boost to get the power. More boost = more heat without the mass to control it better. My friend with a eco boost 3.5 f150 has the same issues on that grade. The benefit of a bigger displacement motor with lower boost is there is more mass and more cooling that can slow down temp spikes underload.

This problem will get worst with more MFR's going with super boosted 4 bangers in full size trucks... I don't see anything good coming from that.

For reference, a turbo 7.3 powerstroke put out 275hp/525tq which isn't much more then a 3.0 VM but is a way less stressed motor that will go forever.

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