Error code
OBD2 P0578
OBD2P0578
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Cruise Control Multi-Function Input 'A' Circuit Stuck.
Severity
moderateYou can continue to drive but the cruise control system may not function properly.
Summary
The P0578 code indicates that there is an issue with the cruise control system's multi-function switch input A circuit, which may be stuck or malfunctioning.
Common Causes
- Poor wiring connection
- Faulty multi-function switch
- Mechanical fault
Fixes
- Replace or repair the multi-function switch and check wiring connections.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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