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.
Free on OBD DashX
Looking for real-world repair data?
OBD DashX shows which problems come with each code, how often they show up in other vehicles, and how to fix them — step by step.
- Real-world fix data
- How often it happens
- Step-by-step repairs
Fault codes
P1105
Manifold Absolute Pressure Sensor Circuit Malfunction
Mercedes Benz
Fuel and Air Metering
High severity
P1116
Engine Coolant Temperature Sensor is Out of Self-Test Range
Mercedes Benz
Fuel and Air Metering
High severity
P1118
Manifold Absolute Temperature Circuit Low Input
Mercedes Benz
Fuel and Air Metering
High severity
P1121
Throttle Position Sensor Inconsistent with Mass Air Flow Sensor
Mercedes Benz
Fuel and Air Metering
High severity
P1123
Throttle Position Sensor Circuit Intermittent High Voltage
Mercedes Benz
Fuel and Air Metering
High severity
P1132
Lack of Upstream Heated Oxygen Sensor Switch Bank 1
Mercedes Benz
Fuel and Air Metering
Medium severity
P1135
Pedal Position Sensor A Circuit Intermittent
Mercedes Benz
Fuel and Air Metering
High severity
P1144
Air Assist Control Valve Circuit Malfunction
Mercedes Benz
Auxiliary Emissions Control
Medium severity
Scan your own car
Read and clear fault codes, live data and service resets with the CaRPM app.