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
P1134
O2 Sensor Heater Circuit Signal Intermittent Bank 1 Sensor 2
BMW
Fuel and Air Metering
Medium severity
P1136
O2 Sensor Heater Circuit High Voltage Bank 1 Sensor 1
BMW
Fuel and Air Metering
Medium severity
P1137
O2 Sensor Heater Circuit Signal Intermittent Bank 1 Sensor 2
BMW
Fuel and Air Metering
Medium severity
P1139
O2 Sensor Heater Circuit High Voltage Bank 1 Sensor 2
BMW
Fuel and Air Metering
Medium severity
P1140
Mass or Volume Air Flow Circuit Range/Performance Problem
BMW
Fuel and Air Metering
High severity
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