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Diagnostic Trouble Code Definitions

WARNING: This page is about a different car, the 2000 Toyota Celica. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC (1) Description
P0100 (2) Mass Airflow (MAF) Meter Circuit
P0101  Mass Airflow (MAF) Meter Circuit Range/Performance
P0110 (2) Intake Air Temperature (IAT) Sensor Circuit
P0115 (2) Engine Coolant Temperature (ECT) Sensor Circuit
P0116  Engine Coolant Temperature (ECT) Sensor Circuit Range/Performance
P0120 (2) Throttle Position (TP) Sensor Circuit
P0121  Throttle Position (TP) Sensor Circuit Range/Performance
P0125  Insufficient Coolant Temperature For Closed Loop Fuel Control
P0130  Heated Oxygen Sensor No. 1 Circuit
P0133  Heated Oxygen Sensor No. 1 Circuit Slow Response
P0135  Heated Oxygen Sensor No. 1 Heater Circuit
P0136  Heated Oxygen Sensor No. 2 Circuit
P0141  Heated Oxygen Sensor No. 2 Heater Circuit
P0171  System Too Lean
P0172  System Too Rich
P0300  Random Misfire Detected
P0301  Cylinder No. 1 Misfire Detected
P0302  Cylinder No. 2 Misfire Detected
P0303  Cylinder No. 3 Misfire Detected
P0304  Cylinder No. 4 Misfire Detected
P0325 (2) Knock Sensor Circuit
P0335  Crankshaft Position (CKP) Sensor Circuit
P0340  Camshaft Position (CMP) Sensor Circuit
P0420  Catalyst System Efficiency Below Threshold
P0440  Evaporative Emission Control System
P0441  Incorrect EVAP Purge Flow
P0446  EVAP Vent Control Circuit
P0450  EVAP Pressure Sensor Circuit
P0451  EVAP Pressure Sensor Range/Performance
P0500  Vehicle Speed Sensor Circuit
P0505  Idle Air Control (IAC) System Circuit
P0710 (3) Transmission Fluid Temperature Sensor Malfunction
P0750 (3) Shift Solenoid Valve SL1 Malfunction
P0753 (3) Shift Solenoid Valve SL1 Electrical Malfunction
P0755 (3) Shift Solenoid Valve SL2 Malfunction
P0758 (3) Shift Solenoid Valve SL2 Electrical Malfunction
P0765 (3)(4) Shift Solenoid Valve S4 Malfunction
P0768 (3)(4) Shift Solenoid Valve S4 Electrical Malfunction
P0770 (3) Lock-Up Solenoid Malfunction
P0773 (3) Lock-Up Solenoid Circuit Electrical Malfunction
P1300 (2) Ignitor No. 1 Circuit
P1305 (2) Ignitor No. 2 Circuit
P1310 (2) Ignitor No. 3 Circuit
P1315 (2) Ignitor No. 4 Circuit
P1335  Crankshaft Position (CKP) Sensor Circuit
P1346  Variable Valve Timing (VVT) Circuit Range/Performance
P1349  Variable Valve Timing (VVT) System Malfunction
P1520  Stoplight Switch Signal Circuit (A/T)
P1600  ECM BATT Circuit
P1645  Body ECU Malfunction
P1656  VVT Oil Control Valve (OCV) Malfunction
P1690  VVL Oil Control Valve (OCV) Circuit Malfunction (2ZZ-GE Only)
P1692  VVL OCV Open/Closed Malfunction (2ZZ-GE Only)
P1693  VVL OCV Open/Closed Malfunction (2ZZ-GE Only)
P1725 (3) Input Turbine Speed Sensor Circuit Malfunction
P1730 (3)(4) Counter Gear Speed Sensor Circuit Malfunction
P1760 (3) Shift Solenoid Valve SLT Malfunction
P1790 (3)(5) ST Solenoid Valve Circuit Malfunction
P1780  Park/Neutral Position (PNP) Switch Circuit
(1) Some codes are two-trip detection logic code(s). For more information, see TWO-TRIP DETECTION LOGIC in SELF-DIAGNOSTICS - INTRODUCTION article.
(2) If this code is set, ECM will enter fail-safe mode.
(3) These codes only apply to models with electronically controlled transmissions. For testing procedures, see appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS.
(4) Only applies to U240E transmission (2ZZ-GE engine).
(5) Only applies to U341E transmission (1ZZ-FE engine).
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