WASHINGTON -- The National Highway Traffic Safety Administration said on Monday it was upgrading a probe into nearly 159,000 Tesla Model S and Model X vehicles over touchscreen failures to an engineering analysis.
The auto safety regulator had opened a preliminary evaluation in June. The NHTSA said the failure can result in the loss of rear-camera image display when in reverse and reduced rear visibility when backing up, and can impact defogging ability, and audible chimes relating to Autopilot and turn signals.
Tesla did not respond to a request for comment.
NHTSA can order a recall of a vehicle following an engineering analysis.
The probe now covers 2012-2018 model year Tesla Model S and 2016-2018 Model X vehicles. The preliminary investigation covered 63,000 Tesla Model S cars.
NHTSA said the failure does not affect vehicle-control systems.
The memory control unit uses an Nvidia Corp. Tegra 3 processor, NHTSA said.
The flas…