Toyota Fault Codes — Causes, Symptoms & Repair

Browse 209 fault codes relevant to Toyota vehicles. A fault code identifies the system reporting an out-of-range condition; accurate repair starts with a full diagnostic scan and live-data checks, not a parts guess.

Common Toyota Fault Codes

• P0741 — Toyota TCC Performance
• P0700 — Toyota TCM Malfunction Request
• P0420 — Toyota Catalyst Efficiency Bank 1
• P2002 — Toyota Innova/Fortuner DPF Efficiency Low
• P0401 — Toyota EGR Insufficient Flow
• P0701 — Transmission Control System Range/Performance
• P0711 — Transmission Fluid Temperature Sensor Range/Performance
• P0715 — Input/Turbine Speed Sensor Circuit
• P0720 — Output Speed Sensor Circuit Malfunction
• P0729 — Gear 6 Incorrect Ratio
• P0730 — Incorrect Gear Ratio
• P0731 — Gear 1 Incorrect Ratio
• P0732 — Gear 2 Incorrect Ratio
• P0733 — Gear 3 Incorrect Ratio
• P0734 — Gear 4 Incorrect Ratio
• P0735 — Gear 5 Incorrect Ratio
• P0743 — Torque Converter Clutch Circuit Electrical
• P0750 — Shift Solenoid A Malfunction
• P0755 — Shift Solenoid B Malfunction
• P0756 — Shift Solenoid B Stuck Off
• P0760 — Shift Solenoid C Malfunction
• P0765 — Shift Solenoid D Malfunction
• P0776 — Pressure Control Solenoid B Performance / Stuck Off
• P0841 — Transmission Pressure Sensor Performance

What to Do When a Warning Light Appears

• Record the warning message and any change in how the car drives.
• Avoid long or high-load driving if the warning is flashing, the car is overheating, or it has entered limp mode.
• Book a diagnostic scan so the stored code, live data and root cause can be checked before parts are replaced.