a quick google search can be done before you post
C1289 Description
The Anti-Lock Brake System (ABS) Module monitors the Pressure Transducer Redundant. The ABS Module sets the OBDII code when the Pressure Transducer Redundant is not to factory specifications.
whoch means your ABS pump is on the way out
give me a call on
0431149649
we can help you sort out your car at lexmania
lucky we have a GS430 in stock to fix your problems