P0103
Mass Air Flow (MAF) Circuit High Input
2012-2015 BMW 320i 2.0L I4 Turbo N20
Moderate SeverityPowertrainGeneric (SAE)
Description
The MAF sensor signal voltage is higher than the maximum expected value.
Symptoms
- Check Engine Light
- Lean fuel condition
- Poor acceleration
- Engine surge
Common Causes
- Faulty MAF sensor
- Short to voltage in signal wire
- Water damage to sensor
Diagnostic Steps
- Check MAF sensor connector
- Test signal voltage
- Inspect wiring for shorts to power
- Test sensor output
Repair Notes
Replace MAF sensor or repair wiring.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0103 on Other Vehicles
Common Questions
What does code P0103 mean on a 2012-2015 BMW 320i?
P0103 stands for "Mass Air Flow (MAF) Circuit High Input". The MAF sensor signal voltage is higher than the maximum expected value.
What are the symptoms of P0103 on a BMW 320i?
Common symptoms of P0103 include: Check Engine Light, Lean fuel condition, Poor acceleration, Engine surge.
What causes P0103 on a 2012-2015 BMW 320i?
Common causes of P0103 include: Faulty MAF sensor, Short to voltage in signal wire, Water damage to sensor.