What does code P06B1 mean?

Q: What does code P06B1 mean?

Sensor Power Supply A Circuit Low. P06B1 indicates that the powertrain control module (PCM) has detected a low voltage condition on the power supply circuit designated as 'A' for a specific sensor or sensor group. This circuit typically provides a regulated 5-volt reference or a dedicated power feed to components such as the mass airflow sensor, throttle position sensor, or manifold absolute pressure sensor, and a low reading means the PCM sees less voltage than expected on that supply line.

DTC codes / P06xx · Computer and output circuits / P06B1

P06B1Sensor Power Supply A Circuit Low

P06B1 indicates that the powertrain control module (PCM) has detected a low voltage condition on the power supply circuit designated as 'A' for a specific sensor or sensor group. This circuit typically provides a regulated 5-volt reference or a dedicated power feed to components such as the mass airflow sensor, throttle position sensor, or manifold absolute pressure sensor, and a low reading means the PCM sees less voltage than expected on that supply line.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaComputer and output circuits

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.