Volvo attributed the problem to software incompatibility, where the software used to regulate the fuel pump on models equipped with 5-cylinder engines might not distribute sufficient fuel “to the active part of the fuel tank,” which could cause engine hesitation or stalling.
A 5-cylinder engine is only available on entry-level, front-wheel-drive S60 sedans. The all-wheel-drive T6 and R Design models have 6-cylinders.
The automaker said it learned of the problem early in May and had received 23 warranty claims for the condition, but was not aware of any accidents because of the problem.
The notice from Volvo was posted on the agency’s Web site over the weekend.