Code Definition

P1144 — Mass Airflow Sensor open circuit or short to ground

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

About P1144

P1144 is a manufacturer-specific powertrain diagnostic trouble code recorded for Volkswagen vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1144 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit; a short-circuit (voltage pulled to ground or to supply) in the monitored circuit; a signal or supply voltage lower than the expected operating range; 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.

P1144 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 mass air flow sensor measures the volume and density of air entering the engine and sends a signal to the Engine Control Module (ECM), which uses it to calculate the correct fuel quantity and ignition timing. DTC P1144 is stored when the ECM detects that the mass air flow signal circuit is open or shorted to ground, so a usable airflow signal is missing. With no valid airflow reading the ECM falls back to a substitute value calculated from throttle position and engine speed. Symptoms can include hard starting, rough idle, hesitation, lack of power, and a reduced power limp mode along with ...

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