Automotive Flow Chart

flowchart TD
    A[Check Engine Light On] --> B[Read Diagnostic Codes]
    B -->|No Codes| C[Check Battery/PCM]
    B -->|Misfire Codes| D[Check Ignition System]
    B -->|Fuel Codes| E[Check Fuel System]
    B -->|Emissions Codes| F[Check Emissions Systems]

    D -->|P0300-P0308| D1[Check Spark Plugs]
    D -->|P0351-P0358| D2[Check Ignition Coils]
    D1 -->|Failed| D3[Replace Spark Plugs]
    D1 -->|Good| D2
    D2 -->|Failed| D4[Replace Coils]
    D2 -->|Good| D5[Check Fuel Injectors]

    E -->|P0171-P0174| E1[Check MAF Sensor]
    E -->|P0201-P0208| E2[Check Injectors]
    E -->|P0087| E3[Check Fuel Pressure]
    E1 -->|Failed| E4[Clean/Replace MAF]
    E2 -->|Failed| E5[Replace Injectors]
    E3 -->|Low| E6[Check Fuel Pump]

    F -->|P0420-P0430| F1[Check Catalytic Converter]
    F -->|P0440-P0455| F2[Check EVAP System]
    F -->|P0401-P0408| F3[Check EGR System]
    F1 -->|Failed| F4[Replace Catalytic]
    F2 -->|Leak| F5[Smoke Test]
    F3 -->|Clogged| F6[Clean/Replace EGR]