"While power steering and braking would remain operational, a vehicle stall while driving at higher speeds could increase the risk of a crash", Toyota said.
Japanese auto giant Toyota has announced a recall of more than 2.4 million hybrid vehicles worldwide because of a fault in their systems that could cause them to lose power.
Vehicles in Europe, China and other regions are also affected. In the case of Toyota's latest recall, some of the hybrids mentioned have undergone two prior recalls to fix related issues.
"We've found that in rare situations, the vehicle may not enter a fail-safe driving mode as intended", Tania Saldana, a Toyota spokeswoman, said in an email to NPR.
The vehicle maker said the fault could in rare situations cause certain models to enter a "failsafe" driving mode, resulting in a lose of power. However, a auto would be at increased risk of causing a crash if it stalled while at a fast speed.
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When asked if any crashes had been reported because of the issue, Toyota offered no comment.
"If this occurs, the vehicle could lose power and stall".
Toyota said it had received three reports from Japan by the end of September that related to the problem and it reported them to the transport ministry.
A total of 744 Toyota Prius cars in Singapore have been recalled due to a fault that could result in a higher risk of the cars crashing.
Toyota said it would update the software in the vehicles for free.
Affected drivers will be sent a letter asking them to book in their vehicle for a software upgrade at their nearest Toyota retailer.