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
P1129
Downstream Oxygen Sensors Swapped from Bank to Bank
Mercedes Benz
Fuel and Air Metering
Medium severity
P1141
Fuel Restriction Indicator Circuit Malfunction
Mercedes Benz
Fuel and Air Metering
Medium severity
P1143
Heated Oxygen Sensor 1 Lean Shift Monitoring Bank 1
Mercedes Benz
Fuel and Air Metering
Medium severity
P1158
Lack of O2 Switches Bank 2 Sensor 2 Indicates Lean
Mercedes Benz
Fuel and Air Metering
Medium severity
P1163
Heated Oxygen Sensor 1 Lean Shift Monitoring Bank 2
Mercedes Benz
Fuel and Air Metering
Medium severity
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