Drive Motor B Position Sensor Circuit A Range/Performance

Where it lives

For P0C56, the part to look at first is the sensor named here.

Check these first

• Drive motor B position sensor A drifting or losing resolution
• A chafed or intermittently open wire in the sensor A circuit
• A sensor A air gap or alignment off at the motor B resolver
• Electrical noise on the sensor A signal from a bad shield ground
• A weak 12 volt supply sagging at the hybrid control module

What to do next

1. Read drive motor B rotor position live data and look for dropouts
2. Inspect the sensor A wiring and shield ground for chafes
3. Check the sensor A air gap and mounting at motor B
4. Verify supply voltage at the hybrid control module
5. Replace drive motor B position sensor A if the signal is erratic
6. Clear the code and retest

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