Mercedes CDI Injector Coding

Supported coding features by StarCOM diagnostic tool https://www.obdtester.com/starcom

Injector Coding

What it does

• Programs individual injector correction codes into the ECU
• Allows precise fuel quantity control for each cylinder
• Optimizes combustion, emissions, and engine smoothness

When it is required

• After replacing one or more injectors
• After engine control unit replacement
• When injector-related fault codes are present
• When engine runs rough or has imbalance

Conditions that must be met

• New injectors installed correctly
• Injector codes (IMA / QR codes) available
• No fuel system leaks
• Ignition ON, engine OFF
• Stable battery voltage

What happens during coding

• ECU stores injector-specific calibration values
• Injection timing and quantity are adapted for:
• Each cylinder
• Engine load
• Emission control

If coding is not performed

• Rough idle or misfire
• Increased fuel consumption
• Higher emissions
• Possible engine damage over time

After coding

• Verify injector data in diagnostics
• Start engine and check smooth running
• Perform a short test drive
• Confirm no injector-related fault codes remain

Coverage in StarCOM