P0594 OBD-II: Cruise Control Servo Control Circuit/Open
P0594 Severity
Will P0594 go away on its own?
Once the vehicle's onboard system no longer detects the issue, most codes will disappear on their own. If your vehicle still has this code, however, it should be properly diagnosed to avoid a more serious problem.
For a proper diagnosis, RepairPal Certified shops have the equipment, tools, and expertise.
Moderate severity codes might not threaten the vehicle's safety or functionality immediately, but you should still get it diagnosed within a reasonable time frame to keep your car running well.
What causes OBD-II fault code P0594?
The cruise control servo is electronically controlled by the engine computer (PCM). This servo controls the vacuum that activates and deactivates the cruise control system. If the Cruise Control Servo does not operate as requested by the PCM, code P0594 will set.
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OBD II Fault Code
- OBD II P0594
OBD-II Code Cruise control will not operate is defined as a Cruise Control Servo Control Circuit/Open
The cruise control servo is electronically controlled by the engine computer (PCM). This servo controls the vacuum that activates and deactivates the cruise control system. If the Cruise Control Servo does not operate as requested by the PCM, code P0594 will set.
Cruise control will not operate Symptoms
- Cruise control will not operate
Common Problems That Trigger the P0594 Code
- Cruise control relay failure
- Cruise control servo failure
- Wiring issue
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