The engine may not start due to a failed starter control module. If the module has indeed failed, it will require replacement.
Car Problem Reports
Volvo S40 Problems With Starter Control Modules
Volvo S40 Problem
Average Mileage: 59,100 mi (27,000 mi - 93,000 mi)
Visitor, 2005 Volvo S40, 72,500 mi
Dash lights came on, but would not crank. Key error message came on.
DTCS codes CEM DD11 1A41 fault traced to start control unit.
Visitor, 2005 Volvo S40, 27,000 mi
Car stalled on a parking lot, jump start did not help, towed it to the dealer, found out the starter control module had to be replaced. Quoted $475.00+tax (this quote includes diagnostic fee of $98.00).
Visitor, 2005 Volvo S40, 93,000 mi
key error please try again ughhh...
Visitor, 2005 Volvo S40, 50,000 mi
It sucked! Needed to be towed... warranty was just up on the 3 yrs owning car, and this was extremely expensive.
Visitor, 2006 Volvo S40, 52,000 mi
key stuck in ignition with car on