Code Definition

P1106 — Manifold Absolute Pressure Sensor Circuit Range/Performance

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

About P1106

P1106 is a manufacturer-specific powertrain diagnostic trouble code recorded for Honda vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1106 is stored, the module has detected 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.

P1106 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 manifold absolute pressure sensor is a piezoresistive transducer supplied with a 5V reference from the Engine Control Module, returning a signal voltage proportional to absolute pressure inside the intake manifold, typically around 2.9V with the key on and the engine stopped at sea level, falling to roughly 1.0V at idle vacuum and rising back toward the reference under wide open throttle. The ECM uses this reading to calculate air density and cylinder filling, which directly determines injector pulse width and ignition timing, and on Honda applications it continuously cross checks the MAP ...

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