Code Definition

P0105 — Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0105

P0105 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0105 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.

Because P0105 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0105 code indicates a malfunction in the circuit of the Manifold Absolute Pressure (MAP) sensor or the Barometric Pressure sensor. These sensors measure the pressure within the intake manifold and the ambient atmospheric pressure, respectively. The Engine Control Module (ECM) uses this data to adjust fuel delivery and ignition timing for optimal engine performance. A malfunction in these circuits can lead to various engine issues, including erratic performance, poor fuel efficiency, and increased emissions.

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