Common OBD2 fault codes found on Mercedes vehicles with model-specific causes, known issues, TSBs, and adjusted repair cost estimates. Each guide is tailored for Mercedes owners.
Exhaust Gas Recirculation Flow Excessive Detected
Mercedes Sprinter • 2010–2024
Sprinter vans with the OM651 2.1 CDI engine are heavy commercial users that see EGR faults early due...
Exhaust Gas Recirculation Control Circuit Malfunction
Mercedes Sprinter • 2010–2024
OM651 Sprinters develop P0403 when the EGR solenoid winding fails from continuous duty cycles in com...
Exhaust Gas Recirculation Control Circuit Range/Performance
Mercedes Sprinter • 2010–2024
OM651 Sprinters often see P0404 alongside P0401 due to heavy commercial duty cycles. The position se...
Exhaust Gas Recirculation Sensor "A" Circuit Low
Mercedes Sprinter • 2010–2024
OM651 Sprinter EGR position sensors fail regularly under heavy commercial use, often before 120,000 ...
Exhaust Gas Recirculation Sensor "A" Circuit High
Mercedes Sprinter • 2010–2024
OM651 Sprinter EGR sensor open-circuit failures are less common than shorts (P0405), but when they a...
Exhaust Gas Recirculation Sensor "B" Circuit Low
Mercedes Sprinter • 2014–2024
OM642 V6 diesel Sprinters (3.0 CDI) use dual EGR valves with dual sensors. P0407 indicates the bank-...
Exhaust Gas Recirculation Sensor "B" Circuit High
Mercedes Sprinter • 2014–2024
OM642 V6 Sprinters (3.0 CDI) develop P0408 when the bank-2 EGR position sensor fails open. The bank-...
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