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
P1117
HO2S Sensor Heater Circuit Short To Ground Bank 1 Sensor 2
Audi
Fuel and Air Metering
Medium severity
P1121
HO2S Sensor Heater Circuit Short To Ground Bank 2 Sensor 2
Audi
Fuel and Air Metering
Medium severity
P1125
Long Term Fuel Trim Adjustment Bank 2 System Too Rich
Audi
Fuel and Air Metering
High severity
P1135
HO2S Heater Circuit- Bank 1 & 2 Sensor 2 Electrical Malfunction
Audi
Fuel and Air Metering
Medium severity
P1152
Bank 1 Long Term Fuel Trim Range 2 Lean Lower Limit Exceeded
Audi
Fuel and Air Metering
High severity
P1166
Bank 1 Long Term Fuel Trim Range 2 Rich Upper Limits Exceeded
Audi
Fuel and Air Metering
High severity
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