Toyota OBD I Diagnostic Trouble Code Definitions

1990, 1991, 1992, 1993, 1994, 1995
EFI Toyota Corolla OBD I Trouble Code Definitions
Code Description
11 ECU Battery Power Malfunction
12 G and NE Signal Circuit (No. 1) -RPM Signal Problem
13 G and NE Signal Circuit (No. 2) -RPM Signal Problem
14 Ignition Signal Circuit
21 Oxygen Sensor Circuit
22 Coolant Temp Sensor Circuit
24 Intake Air Temp Sensor Circuit
25 Air/Fuel Ratio Lean Malfunction
26 Air/Fuel Ratio Rich Malfunction
27 Sub-Oxygen Sensor Circuit (California Only)
31 Manifold Absolute Pressure (MAP) Sensor Circuit (MAP Sensor Equipped)
31 Air Flow Meter Sensor Circuit (MAF Sensor Equipped)
41 Throttle Position Sensor (TPS) Circuit Malfunction
42 Vehicle Speed Sensor (VSS) Signal Circuit
43 Starter Signal Circuit
51 Switch Condition Signal Circuit
52 Knock Sensor Signal Malfunction
53 Knock Control in ECU Fault
71 EGR System Malfunction
72 Fuel Cut Solenoid Signal Malfunction
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Toyota Vehicles:

  • Corolla 1.6L
    • 1990,
      1991,
      1992,
      1993,
      1994,
      1995