P1596 Speed Control Switch Always High

NAME OF CODE
Speed Control Switch Always High

WHEN MONITORED
With the ignition key on.

SET CONDITION
An open condition is detected in the speed control on/off switch circuit.

THEORY OF OPERATION
This circuit is monitored continuously by the PCM whenever the ignition is turned on. The trouble code sets if the voltage in this circuit is above 4.7 volts for more than 1 second.

POSSIBLE CAUSES
- Mux switch circuit shorted to power
- Mux switch circuit open
- Open on/off switch
- PCM failure