OBD-II FAULT CODE
B1390

Oil Temperature Sensor Circuit Short To Ground

Reference information for B1390. 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
Electrical circuit / sensorCategory
MediumSeverity
  • Body/accessory warning lamp or feature not working
  • Wire shorted to chassis/ground
  • Internal component short
  • Check related fuses, connectors, grounds and switch/module power supply
  • Inspect harness for rubbing/pinch points and check resistance to ground
  • Repair insulation/harness damage or replace internally shorted component
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Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.