Is P0204 Indicating a Faulty Fuel Injector?
1 Answers
P0204 fault code indicates a cylinder 4 fuel injector drive circuit malfunction: current too low or open circuit. Below are relevant explanations: 1. Function of fuel injector: The injector atomizes fuel to meet combustion requirements. Its working principle involves electromagnetic coil generating suction when energized, lifting the needle valve to open injection ports, allowing high-speed fuel spray through annular clearance between needle valve tip and ports, forming atomized mist. 2. Fault causes: The ECU controls fuel injection quantity by regulating injector opening duration (pulse width). This trouble code appears when ECU detects errors in injector control circuit.