OBD-II FAULT CODE
C1870

Air Suspension Gate Solenoid Output Circuit Open

Reference information for C1870. 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.

ChassisSystem
Transmission / drivelineCategory
HighSeverity
  • ABS/traction/steering/suspension warning lamp or abnormal chassis behaviour
  • Harsh shifting, limp mode, slipping or delayed engagement possible
  • Low/dirty transmission fluid
  • Solenoid/valve body issue
  • Wiring fault
  • Internal transmission wear
  • Open circuit
  • Inspect wheel/brake/suspension area, connectors, sensor wiring and module power/ground
  • Check transmission fluid level/condition using correct procedure
  • Scan TCM data and inspect connector/wiring
  • Check connector fitment and continuity from module to component
  • Service/repair fluid or wiring issues first, test solenoid/valve body, seek transmission specialist for internal faults
  • Repair open wire/connector or replace the failed component after continuity test
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Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.