What it means
The control module detected a range or performance fault in the drive motor A coolant pump control circuit. Cooling may be affected; the vehicle response depends on the vehicle.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
The drive motor A coolant pump circulates coolant through the motor cooling system. The control module checks whether the pump control circuit performs as expected; this code sets when operation or response is outside its calibrated range, even if the circuit is not fully open.
Common causes
Most likely first.
- Coolant pump fault
- Wiring or connector fault
- Control circuit fault
Symptoms
- EV/hybrid system warning light on
- Reduced motor power or torque
- Possible limp mode or vehicle shutdown
How to diagnose it
- Check freeze-frame data and live pump command, motor temperature, and coolant flow-related readings for conditions present when the fault set.
- Inspect the drive motor A pump connector and harness for looseness, corrosion, damage, or signs of coolant intrusion.
- Confirm the cooling system has the specified coolant level and look for leaks or restrictions that could impair pump performance.
- Use the manufacturer's procedure to command the pump and verify that its response and circuit behavior match the expected operation.
- Test the pump, wiring, and control output individually against the manufacturer's specification to isolate a performance fault.
Common fixes
- Correct a low coolant level or leak using the vehicle's specified coolant and service procedure.
- Repair a loose, damaged, or corroded pump connector or harness.
- Clear a restriction that prevents proper coolant circulation, if confirmed.
- Replace the drive motor A coolant pump if it fails the operational test.
- Repair a control circuit fault if measurements identify one.
Can I keep driving?
Avoid high loads and long trips if motor temperature rises or the hybrid system reduces power; poor pump performance can overheat the drive motor. Stop safely if a temperature warning appears or the vehicle enters limp mode.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.