Code Definition

P1144 — Air Assist Control Valve Circuit Malfunction

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

About P1144

P1144 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 P1144 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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

This code sets when the powertrain control module (PCM) detects an electrical fault in the air assist control valve (AACV) circuit. The AACV helps improve fuel atomization by introducing additional air into the injectors. A malfunction in the circuit can cause poor combustion efficiency, rough idling, or increased emissions.

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