2015 Infiniti Q50

The valve body/TCM. Yes the vehicle is available for inspection. The valve body/TCM shorts out on the car unexpectedly and can happen at any time causing the car to be unable to go pass third gear. This can occur on the freeway, or when trying to avoid an accident. This is an known problem with Infiniti’s & there is also an service bulletin associated with this problem. This vehicle has be inspected by the dealership and they confirmed the issue. There are no warning light or and thing prior to this event. After the failure this codes popped up P0720 & P0500. This occurred on Aug 13, 2022

My Car Suddenly Stopped In The Middle Of The Road With A Check Engine Light. I Have a P0720 & P0500 Codes Indicating A Vehicle Speed Sensor & Output Speed Sensor Failed While Operating . This Cause My Transmission To Fail And Not Shifting. I Am On My Way To The Dealer Now . Hopefully Infiniti Will Do The Right Thing And Fix It . At 56,000 Miles A Transmission Should Not Fail . Unexpectedly Almost Causing A Car Collision . No Prior Warning Was Provided By The Car . The Car Just Suddenly Failed . This Is A Very Serious Safety Concern .

While driving my Q50 on the highway at around 65mph my car automatically down shifted to 1st gear. It was a really hard shift, so hard I thought someone rear ended me. To down shift that quickly on the highway placed me in a very unsafe position. My car almost came to a complete stop without any notice to the vehicle behind me. Someone could have rear ended because I didn't hit my breaks. Thank God the car behind me was pretty far back, because if they had been a little closer, they would have hit me.

I WAS DRIVING MY INFINITI Q50 and puled up to a light. When it turned green I proceeded when I noticed my check engine light comes. It won't shift past 3rd gear. it seems to be in limp mode but there was a tractor trailer barreling down on me. So I get to 35 MPH and ride the side of the road. Once I got home I did a search and apparently there are A LOT of issues with this transmission. Most indicated it was the valvebody and that it could cost upward of $2,500.00 plus there is a back order on them. This is my only car and can't have it tied up to long. I have an appointment to have it diagnosed this coming Wednesday, 06/09/2021. I can't drive it or I will burn up the transmission. If there is such a large problem I would think this would have a recall on it. My car only has 65, 624 miles on the clock. This needs to be addressed. I am hoping for a miracle when it gets diagnosed but with all the evidence out there about the bad transmission in these cars I am expecting the worse.

On 5-25-2021 while merging into traffic on busy I-75. My 2015 Infiniti Q50 did not change into a higher gear as it should have causing the vehicle to not accelerate and lose power then the check engine light came on a few seconds after failure.This failure of the vehicles drive train placed my wife’s life and my life in extreme danger in which we were not able to accelerate with the flow of traffic and was nearly ran over by several semi tractor trucks. The vehicle is in the repair shop for the transmission valve body failure and replacement. I’ve looked this issue up online where numerous owners of this type vehicle have complained and described this as a common problem with these vehicles.

MY CAR PAUSE AND JERKS THEN STOPS. THIS IS THE SECOND TIME THIS HAS HAPPENED AFTER BEING FIXED. THE MECHANIC SAID THEY HAD A RECALL ON THE 2016 MODELS FOR THIS BUT NOT THE 2015 BUT HAD TO CORRECT MANY OF THE 2015 MODELS. THE CHECK ENGINE LIGHT CAME ON AFTER IT STOPPED. I WAS ON THE INTERSTATE THE LAST TIME WHEN IT STOPPED. I AM AFRAID THAT IT MIGHT HAPPEN AGAIN WITHOUT ANY WARNING. THIS IS A LIFE THREATENING DEFECT THAT INFINITI NEEDS TO CORRECT ASAP.

TL* THE CONTACT OWNS A 2015 INFINITI Q50. THE CONTACT STATED WHILE DRIVING APPROXIMATELY 70 MPH, THE VEHICLE JERKED, SHIFTED GEARS, REDUCED SPEED, THE ODOMETER FLASHED, THE CHECK ENGINE WARNING LIGHT ILLUMINATED, AND THE HEATING AND AIR CONDITIONING SYSTEM WENT FROM COLD TO HOT. THE CONTACT GOT OFF THE NEAREST EXIT AND PULLED OVER AND WAITED A WHILE BEFORE CONTINUING TO DRIVE HOME TO PARK THE VEHICLE. THE CONTACT STATED THAT A DIAGNOSTIC CODE READER RETRIEVED DTC CODE: P0720 (OUTPUT SPEED SENSOR). THE CONTACT CONTACTED INFINITI OF TAMPA (4600 N DALE MABRY HWY, TAMPA, FL 33614; (813) 694-1579) AND WAS INFORMED THAT THE CAMSHAFT NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE ISSUE. THE APPROXIMATE FAILURE MILEAGE WAS 65,000.