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
P1149
Air/Fuel Ratio Sensor 1 Circuit Range/Performance
Mercedes Benz
Fuel and Air Metering
High severity
P1151
Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 2
Mercedes Benz
Fuel and Air Metering
Medium severity
P1159
Air/Fuel Ratio Sensor 1 AFS Terminal Low Voltage
Mercedes Benz
Fuel and Air Metering
High severity
P1161
Intake Air Temperature Sensor Open/Short To Positive
Mercedes Benz
Fuel and Air Metering
High severity
P1166
Air/Fuel Ratio Sensor 1 Heater Circuit Malfunction
Mercedes Benz
Fuel and Air Metering
High severity
P1168
Fuel Rail Pressure Sensor Condition Low Pressure
Mercedes Benz
Fuel and Air Metering
High severity
P1178
Linear Oxygen Sensor Pump Current Open Circuit
Mercedes Benz
Fuel and Air Metering
Medium severity
P1183
Engine Oil Temperature Sensor Circuit Malfunction
Mercedes Benz
Fuel and Air Metering
Medium severity
P1185
FTS High Fuel Pump Temperature Sensor High
Mercedes Benz
Fuel and Air Metering
Medium severity
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