There are two causes of gear ratio codes, electrical faults such as bad sensors, wires, controllers, etc.And mechanicals problems, transmission slippage, the wrong ratio parts and or wrong transmission Installed, internal parts failure. . What are your adaptations numbers?



The exciter ring should never move, and if it does you should see an erratic speed sensor reading, not ‘0’. No reading means no signal, and then you should have a code P0715.

It can also mean that 5th gear is in fact slipping. Does your scanner show a gear ratio number if it does, in 5th gear your ratio is 0.83. With a lose exciter ring the transmission needs to be repaired.


The TCM is linked thru a CAN Bus to ALL the modules such as ABS, ASR, etc, you have to scan all the systems, not only the TCM.