OBD II Trouble Code Definitions

OBD2 Diagnostic Trouble Code Tables 1995 - 2016
  • - Monitor Testing Not Complete
  • P1001
    - KOER Not Able To Complete, KOER Aborted
  • P1083
    - Fuel Control Mixture Lean (Bank 1 Sensor 1)
  • - Fuel Control Mixture Rich (Bank 1 Sensor 1)
  • P1085
    - Fuel Control Mixture Lean (Bank 2 Sensor 1)
  • P1086
    - Fuel Control Mixture Rich (Bank 2 Sensor 1)
  • P1087
    - O2 Sensor Circuit Slow Response in Lean Control Range (Bank 1 Sensor 1)
  • P1088
    - O2 Sensor Circuit Slow Response in Rich Control Range (Bank 1 Sensor 1)
  • P1089
    - O2 Sensor Circuit Slow Response in Lean Control Range (Bank 1 Sensor 2)
  • P1090
    - Pre-Catalyst Fuel Trim Too Lean Bank 1
  • P1091
    - Pre-Catalyst Fuel Trim Too Rich Bank 1
  • - Pre-Catalyst Fuel Trim Too Lean Bank 2
  • - Pre-Catalyst Fuel Trim Too Rich Bank 2
  • - O2 Sensor Circuit Slow Response in Rich Control Range (Bank 2 Sensor 1)
  • P1095
    - O2 Sensor Circuit Slow Switching From Lean to Rich (Bank 1 Sensor 1)
  • P1096
    - O2 Sensor Circuit Slow Switching From Lean to Rich (Bank 2 Sensor 1)
  • P1097
    - O2 Sensor Circuit Slow Response after Coast Down Fuel Cutoff (Bank 1 Sensor 1)
  • P1098
    - O2 Sensor Circuit Slow Response after Coast Down Fuel Cutoff (Bank 2 Sensor 2)
  • Please go to our P1000-P1099 forum for aditional codes and for questions and answers about your particular trouble code.