2017 Volvo XC90 Transmission and drivetrain Problems

“On 2018-09-17, the vehicle, a 2017 Volvo XC90 t8 hybrid, reported an error stating reduced performance within the instrument gauge. The vehicle continued to drive, without the hybrid system, only working on the gas engine. The vehicle was driven approximately 3 miles after the error message appeared. The next day, 2018-09-18, the vehicle was started, with the same error. After driving less than a quarter of a mile, the vehicle abruptly halted in the middle of an intersection, and then limited the vehicle speed to 17 miles per hour. …”

“The Park Neutral Position (PNP) switch malfunctions. Yes Not a huge safety issue if you are parked in your driveway and cannot start the car. But if you are driving and the if you have the engine auto start/stop engaged the car will unexpectedly not restart and you have to play with the gear shifter to get it started to move out of an intersection or out of the way of traffic! This has happened several times with my wife and myself. I have not had it confirmed by a dealer or service center No No”

“While driving in hybrid mode while both the gasoline and electric motor are running or shifting back and forth, occasionally the electric motor will come on with a sharp, sometimes loud, metallic “bang”. The sound and feel appears to be coming from the rear. The last two times it happened, the car lunged forward on its own without additional pressure on the accelerator, and once over the past week it lunged forward near an intersection when lifting off the accelerator pedal and engaging the brake. The lunge almost caused me to rear end the car in front of me which I was not very close to. …”

“Vehicle has exhibited lagging and stalling while driving in Pure (electric-only) mode since approximately April 2026, at approximately 85,000 miles, accompanied by an illuminated check engine light. This has occurred repeatedly at red lights, intersections, stop signs, and in stop-and-go traffic, creating a risk of sudden loss of propulsion in live traffic situations, including at intersections where an unexpected stall could result in a collision. …”

“2017 Volvo XC90 T8 plug-in hybrid, approximately 81,000 miles, experienced intermittent hesitation/loss of propulsion when accelerating. When acceleration is requested, the vehicle can hesitate before power is delivered, creating a serious safety concern when entering, merging into, or crossing traffic because expected acceleration is not immediately available. Diagnostic testing identified faults in the IEM/ERAD system, including P286D00, Clutch A Engagement Time Performance/Too Slow, and P0A1B62, Drive Motor A Control Module, Algorithm Based Failure. …”