P0A1B
Drive Motor A Control Module Performance
The drive motor a control module reports a generic fault. Internal self-tests fail or response time outside calibration.
- 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.
- Internal module faultCommon
- Communication degradedPossible
- Module software outdated, reflash may resolveLess likely
Parts involved
- Drive Motor A Control Module
P0A1B 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.