The most common causes of P3173 include: On-board charger (OBC) communication error; Charging port connection issue; DC-DC converter malfunction; Charge controller fault. A professional OBD-II scan tool is recommended for accurate diagnosis.

How do I fix P3173 for Nissan LEAF?

Recommended steps to address P3173: (1) Schedule service as soon as possible (2) Reduce driving speed and avoid long trips (3) Monitor for additional warning messages (4) Have the vehicle diagnosed by a certified technician. Always consult a qualified EV technician for high-voltage system repairs.

Is it safe to drive with P3173?

Driving with P3173 is not recommended for extended distances. Schedule service within a few days to prevent further damage. Monitor for any additional warning lights.

Nissan LEAF

P3173

Warning

On-Board Charger Output Voltage Fault

Severity

Warning

What does P3173 mean?

Fault code P3173 means "On-Board Charger Output Voltage Fault". This is a Nissan-specific EV diagnostic trouble code for the Nissan EV platform. It is classified as "charging" with a severity level of "warning". Applicable models: Nissan LEAF (2010+), Nissan LEAF e+ (2019+).

Possible Causes

On-board charger (OBC) communication error
Charging port connection issue
DC-DC converter malfunction
Charge controller fault

Recommended Actions

1 Schedule service as soon as possible
2 Reduce driving speed and avoid long trips
3 Monitor for additional warning messages
4 Have the vehicle diagnosed by a certified technician

This code applies to all vehicles. View generic P3173 information →