Code Definition

P1103 — MAF Sensor In Range But Higher Than Expected

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Generic

About P1103

P1103 is a manufacturer-specific powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1103 is stored, the module has detected a signal or supply voltage higher than the expected operating range; a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1103 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The P1103 fault code generally indicates an issue with the Mass Air Flow (MAF) sensor, specifically noting that the MAF sensor is within its operational range but the signal is higher than expected. This condition suggests that the airflow being measured by the MAF sensor and reported to the Powertrain Control Module (PCM) is greater than what the PCM anticipates under current operating conditions. This discrepancy can lead to an imbalanced air-fuel mixture, potentially affecting engine performance and emissions.

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