P0105 - Manifold Absolute Pressure/Barometric Pressure Circuit
A Manifold Absolute Pressure Sensor (MAP) is used to measure pressure in the intake manifold. With the ignition on and engine not running this sensor can be used as a barometric pressure sensor to measure atmospheric pressure.
Fault Code Explained
The ECM has detected an undefined fault with the sensor circuit, the sensor values may be outside of normal operating parameters or providing values that are not consistent with the current engine operating conditions
If possible use a diagnostic computer to read live data to compare sensor values with actual values.Carry out wiring and sensor output tests on the faulty circuit