Cruise Control Servo Motor Circuit Malfunction
What does C0202 mean?
The C0202 code means the vehicle's onboard diagnostic system has detected: Cruise Control Servo Motor Circuit Malfunction. This is a low severity code.
Common Symptoms
- Cruise control will not engage
- Cruise control drops out intermittently
- Vehicle speed fluctuates with cruise on
- Cruise control warning light on
- Set speed cannot be maintained
Probable Causes (Ranked by Likelihood)
- Failed cruise control servo or actuator Very High
- Vacuum leak in cruise control system High
- Faulty cruise control switch on steering wheel Moderate
- Cruise control module failure Low
Step-by-Step Diagnostic Procedure
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Scan cruise control module for DTCs
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Test cruise control switches on steering wheel
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Check vacuum hose to cruise servo for leaks
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Test servo operation with scan tool
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Verify brake switch properly disengages cruise
Frequently Asked Questions
Is the cruise control servo the same as the throttle body?
On older vehicles, the cruise control servo is a separate vacuum-operated unit that controls the throttle cable. On newer drive-by-wire vehicles, cruise control uses the electronic throttle body directly.
Why does cruise control cut out on hills?
If cruise control cannot maintain the set speed within a certain range, it may disengage. This can indicate a weak servo or a vehicle that is underpowered for the grade.
Can a brake light switch cause cruise control failure?
Yes. The brake light switch signals the cruise control to disengage. If the switch is faulty and sends a constant brake signal, cruise control will not engage or will immediately drop out.