Suzuki GSF1250 Service Manual page 541

Step
3 1) Check that the front wheel speed sensor is mounted
securely.
Is the sensor mounted securely?
Action
I718H1450066-01
Yes
Go to DTC "42"
(C1642). (Refer to "DTC
"42" (C1642): Wheel
Speed Sensor Circuit
Open (F) (Page 4E-
49)".)
ABS: 4E-48
No
Tighten the mounting
bolts or replace the
bracket if necessary.