I put the Nitto NT05R 345/30-19 tires on some stock rims and did not put the TPMS sensors in as I figured that I would just ignore the warnings when they came on. After several miles the tire pressure warning DIC came on. A while later I got a message that said something like "Engine Braking Enabled" or something along those lines. Does this reduce power output due to the different height in tire and can we turn this off in the tune? I could get some TPMS sensors to install on these rims but if I could avoid it I would like to. Hopefully this will be an easy fix so I can put them back on the car when I am craving some street action. Thanks in advance the forum is great!!!
Do a search and you'll find lots of info about Drag Control. It's also in your Owner's Manual.
The message you got was "Engine Drag Control Active". Because your rear tires are a larger diameter, exceeding the front/rear ratio of the stock tires, the car thinks your rear tires are going too slow when you lift off the accelerator. When in slippery conditions, the rear tires might lose traction and not spin as fast as they should, creating a slipping/skidding situation. The car will add a slight amount of power the keep the tires rolling to maintain traction.
So....that's what you're experiencing. It's not anything to be concerned about - just to be aware of. You won't get all the engine braking you might be used to.
As far as your having no tire pressure sensors in the rear tires, you may not have any problems for street driving. You'll have "xx psi" for each rear tire pressure in the DIC.
You should be able to turn off TC, but you won't be able to go into Comp mode or turn AH off completely. During a hard launch or aggressive cornering, you may invoke the "limp mode", i.e. the car may pull power on you to protect you because it thinks you may have tire pressure problems. Different years seem to have a little different tolerance for running with no sensors.
I recommend getting sensors and doing a relearn procedure to log the different tire pressure sensor ID#s into the TPMS memory every time you swap your wheels.
Not an easy fix. The "engine drag control active" warning shows up because the front is rotating at a significantly slower speed than the rear. It's designed to prevent losing control if you were to downshift incorrectly (too low a gear change without appropriate rev matching) and the motor would start rapidly slowing the car down - and potentially locking up the rear tires.
The solution would be to get a shorter rear tire or a taller front tire. That's why a number of people run the 285 NT05s with the 335 NT05s in the rear. This has given me no trouble.
I ran into the same situation frequently with 275/345 Invos.
345/19 rear and 285/18 front NT05s on my car. No drag control issue. I went with the 285/18 fronts because the overall diameter difference between front and rear was closer to stock than with 275 fronts.
I am looking to order a pair of DR's for my car, is this a common issue that everyone has to deal with? I am running the stock size up front currently, but wanted to put the DR's on a spare set of rear wheels for the track, but I don't want to get there and have my car end up in limp mode or something. Is there anyway to bypass this in case it does show up?
I recently put a set of 345/30/19 NT05R's on the rear and NT05 285/35/18 fronts. I kept my stock rims with the tpms. I have had no issues. HUGE improvement over the gy run flats. 1st gear now has a purpose.
That little button on the console next to the shifter will do it
Z//
So if I just turn the TC off, it will shut it's pie hole and let me do my damn job? That is all I needed to know. My car lives that that button turned off.
Next question, does anyone have the 345/30/19 NT05R's in stock?
So if I just turn the TC off, it will shut it's pie hole and let me do my damn job? That is all I needed to know. My car lives that that button turned off.
Next question, does anyone have the 345/30/19 NT05R's in stock?
Don't sweat it, Scott. I rarely see this message. And it is benign. Doesn't affect power at all. I have 345s on the back with 275s up front.
Thanks for the all of the information. Now I will not be nervous to have some limp home mode take over the car when I am out. I love the Nitto NT05R tires other than they put rubber dust all over the back of the car. I got mine from a vendor on Ebay and they were $700 shipped to my door for the 345's.
Corvette Store
345/30-19 Nitto DIC code for "Engine Braking?"
