OBD fault code library

Look up any P or U code to see what it means, what causes it, the parts involved and how it gets fixed.

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Fault codes

P2207 NOx Sensor Heater Ctrl Circuit High Bank1

Auxiliary Emissions Control High severity

P2209 NOx Sensor Heater Sense Circuit Range/Performance Bank1

Auxiliary Emissions Control High severity

P2210 NOx Sensor Heater Sense Circuit Low Input Bank1

Auxiliary Emissions Control High severity

P2212 NOx Sensor Heater Sense Circuit Interim Bank1

Auxiliary Emissions Control High severity

P2213 NOx Sensor Circuit Bank2

Auxiliary Emissions Control High severity

P2234 O2 Sensor Signal Circuit Shorted to Heater Circuit Bank2 Sensor 1

Fuel and Air Metering Medium severity

P2235 O2 Sensor Signal Circuit Shorted to Heater Circuit Bank2 Sensor 2

Fuel and Air Metering Medium severity

P2318 Ignition Coil G Primary Ctrl Circuit Low

Ignition System High severity

U0198 Internal malfunction detected in Telematic control module

Mercedes Benz Communication Network System High severity

P2238 O2 Sensor Positive Current Ctrl Circuit Low Bank1 Sensor 1

Fuel and Air Metering Medium severity

P2239 O2 Sensor Positive Current Ctrl Circuit High Bank1 Sensor 1

Fuel and Air Metering Medium severity

P2241 O2 Sensor Positive Current Ctrl Circuit Low Bank2 Sensor 1

Fuel and Air Metering Medium severity

P2242 O2 Sensor Positive Current Ctrl Circuit High Bank2 Sensor 1

Fuel and Air Metering Medium severity

P2243 O2 Sensor Ref Voltage Circuit/Open Bank1 Sensor 1

Fuel and Air Metering Medium severity

P2245 O2 Sensor Ref Voltage Circuit Low Bank1 Sensor 1

Fuel and Air Metering Medium severity