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DTC codes / P06xx · Computer and output circuits / P06B0

P06B0Sensor Power Supply A Circuit/Open

P06B0 indicates that the powertrain control module has detected an open circuit or low voltage on the power supply feed (often labeled Sensor Power Supply A) that feeds a group of sensors, typically 5-volt reference sensors. The computer monitors the voltage on this supply line and sets the code when it falls outside the expected range, usually because the circuit is open or shorted to ground.

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.

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