OBD-II FAULT CODE
B1263

Servo Motor Vent Circuit Failure

Reference information for B1263. Because this is manufacturer-specific, confirm the exact definition for the vehicle before using the diagnostic guidance below.

Manufacturer-specific code

This code can have different meanings depending on vehicle make, model and year. Treat the definition below as a reference and confirm it with OEM service information before diagnosis or repair.

BodySystem
EVAP / fuel vapourCategory
LowSeverity
  • Body/accessory warning lamp or feature not working
  • Fuel smell possible
  • Usually little drivability change
  • Loose/damaged fuel cap
  • Cracked EVAP hose
  • Faulty purge/vent valve
  • Leaking canister
  • Check related fuses, connectors, grounds and switch/module power supply
  • Check fuel cap seal first
  • Smoke-test EVAP system
  • Command purge/vent valves with scan tool if available
  • Replace damaged cap/hoses, repair leaks, replace stuck purge or vent valve after testing
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Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.