P2E28
Drive Motor A Excitation Current Sensor Performance
Drive Motor A Excitation Current Sensor Performance: the component is electrically intact but its response does not match the command. This affects electric-drive motor control.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Symptoms
- EV/hybrid system warning light on
- Reduced motor power or torque
- Possible limp mode or vehicle shutdown
Common causes
Ordered by how often each turns out to be the cause.
- Sensor characteristic driftedCommon
- High-resistance contactPossible
- Sensor element aged beyond calibration windowLess likely
Parts involved
- Drive Motor A Excitation Circuit
- Drive Motor A
- Hybrid Control Module
P2E28 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.