What does the P0204 fault code mean?
1 Answers
P0204 fault code indicates a cylinder 4 injector driver circuit malfunction - current too low or open circuit. Below are relevant details: 1. Injector function: The fuel injector atomizes fuel to meet combustion requirements. Its working principle: when the solenoid coil is energized, it generates magnetic force to lift the needle valve, opening the injection hole. Fuel sprays at high speed through the annular gap between the needle valve tip and injection hole, forming atomized spray. 2. Fault cause: The ECU controls fuel injection quantity by regulating injector opening duration (pulse width). This fault code appears when the ECU detects an error in the injector control circuit.