What does P0004 mean on a Mercedes-Benz?

P0004 on Mercedes-Benz models means: Fuel and Air Metering System Malfunction (Circuit 0004). Confirm with a live scan and check manufacturer TSBs before repair.

Is it safe to drive with P0004 on a Mercedes-Benz?

Driving with P0004 depends on severity and symptoms. If the check engine light is flashing or you notice power loss, stop driving and diagnose using OEM procedures.

How do I fix P0004 on Mercedes-Benz?

Start with a full system scan, inspect related wiring and connectors, then follow Mercedes-Benz-specific OEM test steps. Auto Fix Data includes factory procedures and wiring diagrams for Mercedes-Benz models.

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P0004Mercedes-Benz

P0004 on Mercedes-Benz— Symptoms, Causes & OEM Fix

P0004 on Mercedes-Benz vehicles (C-Class, E-Class, Sprinter, S-Class) typically indicates: Fuel and Air Metering System Malfunction (Circuit 0004). Use OEM wiring diagrams and step-by-step diagnostic procedures to isolate the fault before replacing parts.

Síntomas comunes del P0004

• Check Engine Light (CEL) Illumination
• Potential decrease in fuel and air metering system efficiency
• Engine performance issues related to circuit 0004
• Possible stall or rough idle

¿Qué causa el código P0004?

• Faulty sensor or actuator in fuel and air metering system
• Corroded, broken, or shorted wiring harness
• Poor electrical connection
• In rare cases, a failing Engine Control Module (ECM)

Popular Mercedes-Benz models affected

Workshops frequently report P0004 on C-Class, E-Class, Sprinter, S-Class, GLC, A-Class. Always verify the fault on the exact vehicle using OEM data for the correct model year and engine code.

Browse Mercedes-Benz repair manuals → · Generic P0004 guide →