Mercedes-Benz Fault Code List

B1000 HRA HEADLAMP RANGE ADJUSTMENT: SUPPLY VOLTAGE OF THE CONTROL UNIT IS TOO LOW (UNDERVOLTAGE)
P201C-032 cylinder 3 interrupt device fuel insufficient
P201C-064 cylinder 4 interrupt device fuel insufficient
P201C-128 cylinder 2 interrupt device fuel insufficient
P201D P0171 [2] Selfadaptation of mixture formation ,: The mixture is too lean in the part load range. [P0171]
P201D P0171 [8] Selfadaptation of mixture formation ,: Mixture is too lean at idle speed. [P0171]
P201D P0172 [1] Selfadaptation of mixture formation ,: The mixture is too rich in the part load range. [P0172]
P201D P0172 [4] Selfadaptation of mixture formation ,: Mixture is too rich at idle speed. [P0172]
P201D Y62y1 (cylinder 1 injector)(P0201)
P201D Y62y1 (Fuel injector cylinder 1)(P0201)
P201D-001 mixture formation unit adaptation,part load mixture too rich.[P0172]
P201D-002 mixture formation unit adaptation,part load mixture too lean.[P0171]
P201D-004 mixture formation unit adaptation,idle mixture too rich.[P0172]
P201D-008 mixture formation unit adaptation,idle mixture too lean.[P0171]
P201E Y62y5 (cylinder 1 injector)(P0205)
P201E Y62y5 (Fuel injector cylinder 5)(P0205)
P201E-001 CAT effect too small [P0420]
P201F – [1] B40 (Oil sensor (oil level, temperature and quality)) ,: Electrical fault
P201F – [16] B40 (Oil sensor (oil level, temperature and quality)) ,: Oil quality is implausible.
P201F – [2] B40 (Oil sensor (oil level, temperature and quality)) ,: Oil temperature
P201F – [4] B40 (Oil sensor (oil level, temperature and quality)) ,: Oil quality
P201F – [8] B40 (Oil sensor (oil level, temperature and quality)) ,: Oil level
P201F Y62y3 (cylinder 5 injector)(P0203)
P201F Y62y4 (Fuel injector cylinder 4)(P0204)
P201F-001 B40 (engine oil sensor (engine oil condition,temperature and quality)),electrical malfunction
P201F-002 B40 (engine oil sensor (engine oil condition,temperature and quality)),engine oil temperature
P201F-004 B40 (engine oil sensor (engine oil condition,temperature and quality)),engine oil quality
P201F-008 B40 (engine oil sensor (engine oil condition,temperature and quality)),engine oil condition
P201F-016 B40 (engine oil sensor (engine oil condition,temperature and quality)),engine oil quality error
P2020 – [1] M4/3 (engine/AC electric suction fan) ,: Short circuit to positive
P2020 – [2] M4/3 (engine/AC electric suction fan) ,: Short circuit to ground / Open circuit in wiring
P2020 check fuel rail pressure:B4/6 (fuel rail pressure sensor) racing test.
P2020 check fuel rail pressure:Y74 (pressure regulation valve) racing test.
P2020 check fuel rail pressure:Y94 (flux regulation valve) racing test.
P2020 check Y74 (pressure regulation valve).Short
P2020 check Y94 (flux regulation valve).Short
P2020 Y62y2 (Fuel injector cylinder 2)(P0202)
P2020 Y62y6 (cylinder 5 injector)(P0206)
P2020-001 M4/3 (engine/A/C electronic intake air device),positive short
P2020-002 M4/3 (engine/A/C electronic intake air device),overload/wire open cause short
P2021 – [1] Relays Starter ,: Short circuit to positive
P2021 – [2] Relays Starter ,: Short circuit to ground / Open circuit in wiring
P2021 check Y74 (pressure regulation valve).Current in pressure regulation valve too large
P2021 check Y74 (pressure regulation valve).Current in pressure regulation valve too small.Fuel rail pressure too high.
P2021 check Y74 (pressure regulation valve).Current/fuel rail pressure too large
P2021 check Y74 (pressure regulation valve).Current/fuel rail pressure too small
P2021 check Y74 (pressure regulation valve).Fuel rail pressure too small.
P2021 check Y74 (pressure regulation valve).Maximal pressure will be rewrite.
P2021 check Y74 (pressure regulation valve).Negative regulation error
P2021 check Y74 (pressure regulation valve).Regulation error too large
P2021 Y62y2 (cylinder 5 injector)(P0202)
P2021 Y62y6 (Fuel injector cylinder 6)(P0206)
P2021-001 starter relay,positive short
P2021-002 starter relay,overload/wire open cause short
P2022 P0135 [1] Heating of component G3/2 (O2 sensor upstream TWC) ,: Short circuit to positive [P0135]
P2022 P0135 [2] Heating of component G3/2 (O2 sensor upstream TWC) ,: Short circuit to ground [P0135]
P2022 P0135 [4] Heating of component G3/2 (O2 sensor upstream TWC) ,: Open circuit in wiring [P0135]
P2022 P0135 [8] Heating of component G3/2 (O2 sensor upstream TWC) ,: Heating capacity is too low. [P0135]
P2022 check fuel injector.Cylinder 1 misfire
P2022 check fuel injector.Cylinder 2 misfire
P2022 check fuel injector.Cylinder 3 misfire
P2022 check fuel injector.Cylinder 4 misfire
P2022 check fuel injector.Cylinder 5 misfire
P2022 check fuel injector.Cylinder 6 misfire
P2022 check fuel injector.Cylinder 7 misfire
P2022 check fuel injector.Cylinder 8 misfire
P2022 Y62y3 (Fuel injector cylinder 3)(P0203)
P2022 Y62y4 (cylinder 5 injector)(P0204)
P2022-001 component G3/2 (before CAT O2 sensor) heating device,positive short [P0135]
P2022-002 component G3/2 (before CAT O2 sensor) heating device,overload short [P0135]
P2022-004 component G3/2 (before CAT O2 sensor) heating device,wire interrupt [P0135]
P2022-008 component G3/2 (O2 sensor before CAT) heating device,heating power too small.[P0135]
P2023 P0141 [1] Heating of component G3/1 (O2 sensor downstream TWC) ,: Short circuit to positive [P0141]
P2023 P0141 [2] Heating of component G3/1 (O2 sensor downstream TWC) ,: Short circuit to ground [P0141]
P2023 P0141 [4] Heating of component G3/1 (O2 sensor downstream TWC) ,: Open circuit in wiring [P0141]
P2023 P0141 [8] Heating of component G3/1 (O2 sensor downstream TWC) ,: Heating capacity is too low. [P0141]
P2023 check Y83 (intake air manifold turnoff switch valve).Circuit open
P2023 check Y83 (intake air manifold turnoff switch valve).It is OFF when left intake air manifold is closed.
P2023 check Y83 (intake air manifold turnoff switch valve).It is OFF when right intake air manifold is closed.
P2023 check Y83 (intake air manifold turnoff switch valve).It is ON when left intake air manifold is closed.
P2023 check Y83 (intake air manifold turnoff switch valve).It is ON when right intake air manifold is closed.
P2023 check Y83 (intake air manifold turnoff switch valve).Short
P2023 check Y83 (intake air manifold turnoff switch valve).Short to ground
P2023 K40/7kN (air pump relay)(P0410)
P2023-001 component G3/1 (O2 sensor before CAT) heating device,positive short [P0141]
P2023-002 component G3/1 (O2 sensor before CAT) heating device,overload short [P0141]
P2023-004 component G3/1 (O2 sensor before CAT) heating device,wire interrupt [P0141]
P2023-008 component G3/2 (O2 sensor before CAT) heating device,heating power too small.[P0141]
P2024 P0106 [4] B28 (Pressure sensor) ,: Signal B28 (Pressure sensor) not equal to signal B18 (Altitude pressure sensor) when engine not running [P0106]
P2024 P0107 [2] B28 (Pressure sensor) ,: Short circuit to ground [P0107]
P2024 P0108 [1] B28 (Pressure sensor) ,: Short circuit to positive / Open circuit in wiring [P0108]
P2024 check Y27/10 (right exhaust gas recirculation regulator) regulator fault (via ground key).
P2024 check Y27/10 (right exhaust gas recirculation regulator).Circuit open
P2024 check Y27/10 (right exhaust gas recirculation regulator).Short
P2024 check Y27/10 (right exhaust gas recirculation regulator).Short to ground
P2024 check Y27/9 (left exhaust gas recirculation regulator) regulator fault (via ground key).
P2024 check Y27/9 (left exhaust gas recirculation regulator).Circuit open
P2024 check Y27/9 (left exhaust gas recirculation regulator).Short
P2024 check Y27/9 (left exhaust gas recirculation regulator).Short to ground
P2024 Y32 (Air pump switchover valve)(P0412)
P2024 Y32/2 (air pump switch-over valve,right cylinder bank)(P0412)