What causes the flashing of the 4LO light on a Prado?

[Emma]

The flashing of the 4LO light on a Prado is caused by engine misfiring leading to excessively high exhaust temperatures, poor operation of individual cylinders, or overly rich fuel mixture resulting in poor combustion. Common solutions include checking the condition of spark plugs and high-voltage wires; inspecting whether the cylinder pressure is normal, and if not, examining whether the valves and cylinder gasket are damaged; and checking the fuel injection system. Below is an introduction to common faults in automotive electrical systems: 1. Engine not turning: When the starter switch is engaged, the starter motor spins freely, but the engine does not turn. The fault mainly lies in the starter's control and operating components or the starter's one-way clutch. 2. Poor instrument operation: Malfunctioning of various instruments on the dashboard. The causes of instrument failures include short circuits in the combination instrument's power supply or grounding circuits, damage to sensors and their wiring, or damage to the instrument cores. The causes of warning light failures on the dashboard include bulb failure, loose lamp sockets, or damage to alarm sensors and their wiring. 3. Poor lighting operation: Malfunctioning of various lights on the vehicle. Possible causes include bulb failure, loose lamp sockets, or poor operation of the lighting circuit system, mainly due to faults in the power supply or wiring, switches, and plugs in the circuit.