P1109 ACURA, HONDA: BARO SENSOR CIRCUIT OUT OF HIGH RANGE
POST UPDATED IN January, 2023
P1109 ACURA, HONDA: BARO SENSOR CIRCUIT OUT OF HIGH RANGE
The P1109 OBDII fault code is a manufacturer-specific code, and in the case of Acura and Honda, indicates that it is set when the ECM (Engine Control Module) detects that the signal coming from the BARO Sensor (Barometric Pressure Sensor) is not within the expected range.
The BARO sensor provides the Engine Control Module with data about atmospheric pressure, which tends to change according to the altitude driven. This sensor works in conjunction with the Manifold Absolute Pressure sensor (MAP) so that the ECM can determine strategies to increase fuel efficiency, as well as better ignition timing.
P1109 OBD2 diagnostic code is set for one or more of the following reasons:
The steps to follow to give the respective solution to the DTC P1109 OBDII code are as follows: