P1129 ACURA, HONDA: MANIFOLD ABSOLUTE PRESSURE SENSOR CIRCUIT HIGHER THAN EXPECTED
POST UPDATED IN January, 2023
P1129 ACURA, HONDA: MANIFOLD ABSOLUTE PRESSURE SENSOR CIRCUIT HIGHER THAN EXPECTED
The MAP (Manifold Absolute Pressure) Sensor monitors the intake manifold pressure. Then, it provides this data to the PCM (Powertrain Control Module) that uses it to calculate air density; a value used to determine the engine’s air/mass flow rate. The fuel dosage can also be calculated with the information sent by the MAP Sensor to optimize the combustion process.
The signal from the Manifold Absolute Pressure Sensor is compared by the PCM with other sensors signals and can be checked for proper operation. Keep in mind that the readings from this sensor should change with driving conditions.
The PCM continuously checks the MAP Sensor. If voltages exceeding the maximum set limit are detected, the P1129 OBDII fault code will be stored.
The P1129 OBD2 diagnostic code P1129 is set for the following reasons:
Steps to troubleshoot the P1129 OBDII DTC: