I've gotten both a P0045 and a P0299 code the last couple of days. I've been running the cit1991 V7 tune for several months with no other issues. I downloaded back to stock and the issue went away. I also realized that the two days I got the codes, with the tune, the truck went into high idle mode. Truck will have no power once the codes are set until I shut it down and restart. No CEL either.

As a simple recap, (cit1991 V7)+(high idle)=(P0045)+(P0299)

Any thoughts?

p0045 + p0299 = what?

what do these codes stand for?

p0045 + p0299 = what?

what do these codes stand for?


Sorry guess I should have put that in the original post

P0045 - Turbocharger Vane Position Control Solenoid Control Circuit
P0299 - Turbocharger Engine Underboost

did you change anything in cits tune
he is a excellent tuner imo and just wondering if you missed something
when transfering everthing over to your op system?

this code only came on when you altered high idle settings?

or does it come on when driving?

possible you did not change vane target position?

did you change anything in cits tune
he is a excellent tuner imo and just wondering if you missed something
when transfering everthing over to your op system?

this code only came on when you altered high idle settings?

or does it come on when driving?

possible you did not change vane target position?



I didn't change anything in his tune and we have the same operating system so I don't think I missed anything when I did the compare and update.

The codes only come up in the morning after I first start the truck and it goes into "high idle' while warming up.

I'm guessing it might be something that cit1991 never noticed since he's in Texas and he truck probably doesn't go into "high idle" much if at all.

Log it and post it here so we can have a look

I'll see if it'll do it again tomorrow morning and if it does I'll log and post it.

Is there not a design feature programmed in the high idle mode that uses the turbo to create extra backpressure during high idle to speed up the engine warm up? Maybe it is related to that?

I'm having the same issue with his v6 tune transferred to the '758 2005 OS, except I don't get the P0045, just the P0299. Like rpidelt, it only shows up when the truck goes into {automatic} high idle.

I get the 0299 with all my tunes too. I decided it was because I only changed the desired boost level table and not the vane target position table. They should match fairly closely since they do the same thing, but if they don't I would suspect it sets this code. I asked one night in the lounge and guys agreed with my thinking. Told me I needed to do a turbo vane position relearn, which involved logging vane position when driving and then putting those values back into the table. Since I don't have a laptop I haven't done that, and don't know exactly how to.

I'm having the same issue with his v6 tune transferred to the '758 2005 OS, except I don't get the P0045, just the P0299. Like rpidelt, it only shows up when the truck goes into {automatic} high idle.

I also tripped the P0299 code tonite. I don't have time to log it right now, but will try to find the cause of this next week. For now I will turn off the fast cold idle function.

I've seen the same, 0299 code a few times too. It only seems to set when under cold start in am and the truck on high idle. I reset it all yesterday and wanted to see what happens today. Yesterday was -5* C (20 F?) and this morning looks like -13* C ( 9 F). And yes, used slightly modified cit tune.

No luck finding the code when I was looking. The P0299 is already there in the morning as I turn the key. Again the temperature was low. I have not been able to check this againe since the temps have warmed up to 9 *C. I will try again when it cools down( soon I hope, sick of the rain.

If this problem is only happening when it is cold, the simple fix would be to increase the value of parameter C0801 which defines the lowest temp the boost DTC tests will run. 'hogstroker', -13°C is pretty cold!, try setting that parameter to maybe 40°C, the engine will be starting to warm up nicely by then and high idle should have timed out.

Cheers,
Ross

Thanks Ross, I haven't had any more since, but I will try this today. We may get some more seasonal weather here again soon. I was wondering if it would be something like that.
I will report again when we have beter test weather.

Henk.

Ross...Would your MAF replot work in this situation?

If this problem is only happening when it is cold, the simple fix would be to increase the value of parameter C0801 which defines the lowest temp the boost DTC tests will run. 'hogstroker', -13°C is pretty cold!, try setting that parameter to maybe 40°C, the engine will be starting to warm up nicely by then and high idle should have timed out.

Cheers,
Ross

Thanks Ross, I'll try this out in my tune and see if it stops the code.

One other thing I did was to set the max vane position table back to stock for RPM's 1200 and below at low throttle settings.

Changing the max vane pos table back to stock did not fix the problem.

Changing the RPM to check boost (either C0800 or C0802) to 1300 rpm (stock was 600 rpm) fixed this problem on my truck.

FWIW, I tried this on mine (moved temp up to like 45*) and it still threw a P0299 when the elevated idle kicked in.


If this problem is only happening when it is cold, the simple fix would be to increase the value of parameter C0801 which defines the lowest temp the boost DTC tests will run. 'hogstroker', -13°C is pretty cold!, try setting that parameter to maybe 40°C, the engine will be starting to warm up nicely by then and high idle should have timed out.

Cheers,
Ross

You guys need to log all the vein positions and then use the MAP Feature to play it back, that will tell you what the ecm is seeing for vein position and that should get you the data you need.

T:D NY

Yep it will still throw a P0299 code just changing the temp setting.


FWIW, I tried this on mine (moved temp up to like 45*) and it still threw a P0299 when the elevated idle kicked in.

Same kind off problem, but I'm getting po101,po234,po299,po1093?:mad: