Sensor Power Supply B Circuit/Open

Where it lives

For P06B3, the sensor sits on the circuit this code reports. The description of P06B3 reports the sensor as open.

Check these first

• A broken or chafed wire in the reference B harness run
• Corroded connector pins interrupting supply B
• A shorted sensor on supply B pulling the voltage low
• Water intrusion into a sensor connector on circuit B
• An internal PCM supply driver fault

What to do next

1. Check the reference B voltage at each sensor on the circuit
2. Inspect connectors on supply B for corrosion, water, or pushed pins
3. Unplug sensors one at a time to find the one dragging the supply down
4. Check the reference B wiring for opens and shorts
5. Repair the fault, then clear and retest

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