Manufacturer-specific code

This code means different things on different makes. Find yours below.

• Toyota, Lexus

  Air/fuel ratio sensor heater circuit response (bank 1 sensor 1)

  The heater inside the front air/fuel ratio sensor is not working correctly, so the sensor takes too long to reach working temperature.

  Likely causes, most likely first

  1. 01Failed heater inside the air/fuel ratio sensor (most common)
  2. 02Blown A/F heater fuse
  3. 03Wiring or connector fault

  Severity: Caution: get it checked soon · DIY with tools and some experience