This Volkswagen manufacturer-specific code indicates an issue with the idle/speed control system. Code P1598 is specific to Volkswagen vehicles and requires manufacturer diagnostic procedures.
Find certified mechanics near you who can diagnose and repair P1598.
For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.