So at the racetrack my car went limp mode and the service engine soon light came on. Pit in and read the code as p26de. I quickly googled what it meant and some says it is the sound symposer (which I thought is stupid as to why they will put the car on limp) OR the factory titanium exhaust Valvetronic.
Makes more sense the Valvetronic issue will cut power so I start removing the actuator and check the valve mechanisms at the track and they all are moving just fine. It is here I noticed that after clearing my code and with the exhaust sound control off (open valve) the car doesn’t throw the code. Closing the valve however throws the code in 5secs
I gave up trying to figure it out and drive it on the track after clearing the code. After 10 minutes on track the CEL came back and limp again. I did it again so I can drive another 10min on track. It’s frustrating. Kinda embarrassing that a car I just gotten has malfunctioned severely.
So next day comes along and I’m diagnosing it myself as service appointment is 1 week away. Found out if I start the car and set something to R mode before I drive, the CEL and limp doesn’t come on within a 10min drive (didn’t drive longer) However if I do not put R mode before I drive the CEL and limp comes on shortly consistently
I suspect there is a glitch in the matrix with the sound symposer system. Cleaned the mic’s, tried taping it, and nothing seems to work. As stated earlier I did briefly physically check the valvetronics at the track.
UPDATED: Nissan tech determines Exhaust Sound Control valve actuator is giving bad signals back to control unit as I expected
TEMPORARY WORKAROUND: clear code. Turn off vehicle. Wait 10 sec. start vehicle with exhaust sound control off (open valve). Wait 10sec. Put anything on R mode. Enjoy 😉
Edited by GT-ARR, 14 August 2019 - 09:54 AM.