P06B3Sensor Power Supply B Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- Despite the similar name, 'sensor power supply' is not the 5 V sensor reference (P0641 ff). It is documented in GM hybrid drive motor control modules: a 15 V supply that excites the motor position sensor (resolver) and powers the gate drivers of the inverter transistors, kept separate from the 5 V reference and the 12 V supply. In GM's 2008 Two-Mode hybrid, A and B are the two motor control modules. P06B3 is the general or open-circuit code of supply B, the second module. Only Mitsubishi's 2022 Outlander bulletin lists this code (as a main code with low/high sub-codes), without thresholds or sensor assignment. Low and high are P06B4/P06B5; check fuses and feeds of the second motor control module first.
- What you may notice
- Check engine or hybrid warning light
- Electric drive or hybrid mode limited or disabled
- Further motor position or inverter codes
- Likely causes
- LikelyBlown fuse or open feed to the module
- PossibleInternal supply circuit of the motor control module faulty
- PossibleConnector or wiring fault
- RareShort in a supplied component
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.