Trouble Code: P0402 Toyota – Excessive EGR Flow

P0402 Toyota Code Definition Excessive EGR Flow Symptoms: Check Engine Light will illuminate In most cases, there are no adverse conditions noticed by the driver In some cases, there may be performance problems, such as dying at stop signs or rough idling, hesitation, misfires or lack of power (especially during acceleration), and a decrease in…

Trouble Code: P0401 Toyota – Insufficient EGR Flow

P0401 Toyota Code Definition Insufficient EGR Flow Symptoms Check Engine Light will illuminate In most cases, there are no adverse conditions noticed by the driver In some cases, there may be performance problems, such as pinging on acceleration, when the engine is under load or when driving the vehicle at higher speeds Possible Problems: Restriction…

Trouble Code: Toyota P0770 – Shift Solenoid ‘E’ Malfunction

Trouble Code: Toyota P0770 – Shift Solenoid ‘E’ Malfunction Likely Cause: Low transmission fluid level Dirty transmission fluid Faulty shift solenoid ‘E’ valve Shift solenoid ‘E’ valve harness is open or shorted Shift solenoid ‘E’ valve circuit poor electrical connection What does the Toyota P0770 code mean? The Toyota P0770 code is detected when Lock up…

Trouble Code: Toyota P1349 – Variable Valve Timing System Malfunction Bank 1

Trouble Code: Toyota P1349 – Variable Valve Timing System Malfunction Bank 1 Likely Cause: Dirty or low engine oil Valve timing Oil control valve Variable Valve Timing controller assembly Engine Control Module (ECM) What is the Toyota P1349 code mean? The Toyota P1349 code is triggered when the valve timing does not change from of…

Trouble Code: TOYOTA P0171 System Too Lean Bank 1

Trouble Code: TOYOTA P0171 System Too Lean Bank 1 Likely Cause: The MAF (Mass Air Flow) Sensor is dirty or faulty There could be a vacuum leak downstream of the MAF sensor Possible cracked vacuum or PCV line/connection Faulty or stuck open PCV valve Failed or faulty oxygen sensor (bank 1, sensor 1) Sticking/plugged or…