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
P1109
HO2S22 Sensor Circuit Voltage Too Low Air Leak
Volkswagen
Fuel and Air Metering
Medium severity
P1115
HO2S Sensor Heater Circuit Short To Ground Bank 1 Sensor 1
Volkswagen
Fuel and Air Metering
Medium severity
P1117
HO2S Sensor Heater Circuit Short To Ground Bank 1 Sensor 2
Volkswagen
Fuel and Air Metering
Medium severity
P1119
HO2S Sensor Heater Circuit Short To Ground Bank 2 Sensor 1
Volkswagen
Fuel and Air Metering
Medium severity
P1120
HO2S Sensor Heater Circuit Open Bank 2 Sensor 1
Volkswagen
Fuel and Air Metering
Medium severity
P1123
Long Term Fuel Trim Adjustment Bank 1 System Too Rich
Volkswagen
Fuel and Air Metering
High severity
P1124
Long Term Fuel Trim Adjustment Bank 1 System Too Lean
Volkswagen
Fuel and Air Metering
High severity
P1126
Long Term Fuel Trim Adjustment Bank 2 System Too Lean
Volkswagen
Fuel and Air Metering
High severity
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