Nissan LEAF

P317B

Critical

Traction Motor Inverter Fault (variant C)

Severity
Critical
Category
Motor
Code Type
Manufacturer Specific
Applicable Regions
US, EU, Global

What does P317B mean?

P-code P317B means "Traction Motor Inverter Fault (variant C)". It is a manufacturer-specific diagnostic trouble code (DTC) in the electric motor / drive system. A fault has been detected in the traction motor inverter fault (variant c) — the control module has logged this condition during self-diagnostics. This is a critical fault — stop driving immediately and seek service. This code applies to OBD-II compliant electric and hybrid vehicles.

Possible Causes

  • Faulty or failed component in the electric motor / drive system
  • Damaged or corroded wiring and electrical connectors
  • Control module software error or firmware fault
  • Poor or missing ground connection at the affected module
  • Inverter or motor controller hardware failure

Recommended Actions

  1. 1 Stop driving safely as soon as possible — this is a critical fault that may affect vehicle operation
  2. 2 Scan for all DTCs with an OBD-II scanner — note any related codes stored alongside P317B
  3. 3 Inspect the electric motor / drive system component and its wiring for visible damage
  4. 4 Check for water intrusion in connector areas and clean contacts if corroded
  5. 5 Clear the DTC, road-test the vehicle, and re-scan to confirm whether the fault returns
  6. 6 If the fault returns, have the vehicle inspected at an authorized service center immediately

This is a critical fault code. Pull over safely and seek immediate professional assistance.

This code applies to all vehicles. View generic P317B information →