Cruise Control Vent Control Circuit Open
The vent solenoid of a vacuum-driven cruise servo - which releases vacuum to drop throttle - has an open control circuit. The servo cannot release vacuum, so cruise speed cannot be reduced.
Affected components
- Cruise vent solenoid
Common causes
- High likelihood: Open in solenoid or harness
- Low likelihood: Pin pushed back out of connector body
- Low likelihood: Cracked solder joint inside the module or sensor
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.