SpareRadar OBD-II Code Lookup

P1166

Set by the manufacturer, so it means different things on different makes. 8 makes in the table below.

More codes than this one? Paste your whole scan
What P1166 means, by make 8 makes
  • Acura Primary HO2S (No. 1) Heater System Electrical
  • Audi Bank1,Long Term Fuel Trim,Range 2 Rich Limit Exceeded
  • Chevrolet Oxygen Sensor System - Low Voltage During Power Enrichment (Bank 1 - Sensor 1)
  • Honda Air/Fuel Ratio (A/F) Sensor (Sensor 1) Heater System Electrical Problem A/F sensor heater,or Heated Oxgen Sensor
  • Hyundai HO2S Bank 1 Sensor 1 Controller Adaptive Diagnosis Fault (Bank 1)
  • Nissan Heated O2 Sensor 2
  • Volkswagen Long Term Fuel Trim 2 Bank 1 Rich Limit Exceeded
  • Volvo Bank1,Long Term Fuel Trim,Range 2 Rich Limit Exceeded

Each line is that manufacturer's own meaning for P1166. They are genuinely different faults, not rewordings of one, so a meaning listed against one make says nothing about the others. If your make is not listed, we do not hold it - your manufacturer's service information is the authority.

Code structure P1166
P
Powertrain
engine, transmission and emissions
1
Manufacturer-specific
Defined by the vehicle manufacturer, so the meaning varies between makes.
1
6
6
Fault index
identifies the specific fault
Powertrain Manufacturer-specific
Nearby codes in the P1 range
P1160 manufacturer-specific, 8 makes P1163 manufacturer-specific, 8 makes P1164 manufacturer-specific, 7 makes P1165 manufacturer-specific, 7 makes P1167 manufacturer-specific, 10 makes P1169 manufacturer-specific, 15 makes P1170 manufacturer-specific, 15 makes P1173 manufacturer-specific, 16 makes

Manufacturer code meanings from kierandrewett/obd (b56a07a), used under the MIT licence. Copyright (c) Kieran Drewett. SpareRadar is not affiliated with the dataset's authors.