Engine-Codes - Generic - P125C

P125C - Nitrogen Oxide Sensor Heating Supply Voltage

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P125C Possible Causes

  • Faulty Nitrogen Oxide (NOx) Sensor
  • Nitrogen Oxide (NOx) Sensor harness is open or shorted
  • Nitrogen Oxide (NOx) Sensor circuit poor electrical connection

How is the P125C code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the P125C code

Labor: 1.0

The cost to diagnose the P125C code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P125C Meaning

The Engine Control Module (ECM) monitors the Nitrogen Oxide (NOx) Sensor. The ECM sets the OBDII code when the Nitrogen Oxide (NOx) Sensor is not to factory specifications.

More Information

Need more information on how to fix the P125C code?
Get Access to Factory Service Manuals

Information for specific makes

  • P125C BMW Nitrogen Oxide Sensor Heating Supply Voltage
  • P125C MINI Nitrogen Oxide Sensor Heating Supply Voltage

Need more help?

Get the P125c code diagnosed by a professional: Find a repair shop in your area