DTC codes / P06xx · Computer and output circuits / P06B0
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.
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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