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jeffrey590, ASE Master Technician
Category: Car
Satisfied Customers: 2847
Experience:  ASE Master Technician , Saab Master Technician w/ 35 years Dealer Experience in Advanced Level Diag.
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Saab: automatic..way power going up a hill..light came

Resolved Question:

saab 9-5 automatic, stuck in high gear last night on way home. very slow to pull off at crossing and almost no power going up a hill. both engine light and transmission light came on together. This morning driveing ok but lights still on.
Submitted: 7 years ago.
Category: Car
Expert:  jeffrey590 replied 7 years ago.
Good MorningCustomer Your vehicle was in what is known as "limp home" mode last night...Basically the name says it all...There was a failure in the shift strategy,either mechanical or electrical,and the Transmission Control Module (TCM) saw information that didn't coincide with its programming...Therefore it initiated the built in failsafe mode...The vehicle starts in 3rd gear(your lack of power)and only shifts if it is capable depending on the problem..The thought behind this is to enable the driver to get the vehicle home without getting stranded...The good news is since the light has remained on there is a fault code stored in the TCM which will indicate the precise fault and exact data of the Engine Management and Transmission systems when it occurred...This is known as "freeze frame" data...You will need to get the vehicle to a repair shop that has a Tech2 scan tool (Saab Dealer or Saab Independent shop) so they can scan the system and retrieve the fault(s)...This will give you the lowdown on what failed and how much it will cost to fix it...Keep in mind this doesn't necessarily have to be an expensive repair...I have had many Saabs with software "glitches"'and a simple clearing of faults and system reset was all that was needed to repair the problem...jeffrey590
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