P0106 Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance

P0106 points to manifold absolute pressure or barometric pressure data that is outside the expected range or performance window. The MAP/BARO signal does not match the engine model.

Code details

Generic OBD-II · P0

System: Fuel / Air
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace the MAP sensor before checking the vacuum source and reference voltage; a blocked port or wiring issue can mimic sensor failure.

Symptoms of P0106

Hesitation, surging, or poor throttle response.
Rough idle or stalling.
Check-engine light, sometimes with fuel-trim codes.

Common causes of P0106

A failing manifold-absolute-pressure (MAP) sensor.
A vacuum leak or a blocked MAP port/hose.
MAP wiring or connector faults.
A related intake or gasket leak.

Useful checks before replacing parts

Compare MAP reading with barometric pressure key-on engine-off, then watch MAP response during idle and throttle changes.
Inspect vacuum hoses, intake leaks, sensor port blockage, wiring, connector pins, and sensor ground integrity.
Review fuel trims, misfire codes, and throttle data because airflow and pressure faults often influence each other.

Related OBD-II codes

These nearby fuel / air entries can help compare wording and pin down the fault area.