What it means
The current sensor for drive motor A phase Z reports a circuit high fault. Phase current measurement is unreliable.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
Drive motor A uses separate phase-current sensing to help its controller regulate torque and detect electrical imbalance. The controller monitors the phase Z sensor circuit and sets P2E26 when its signal is higher than the expected range, making the phase Z current reading unreliable.
Common causes
Most likely first.
- Current sensor failed
- Wiring fault
- Connector pins corroded - high contact resistance
Symptoms
- EV/hybrid system warning light on
- Reduced motor power or torque
- Possible limp mode or vehicle shutdown
How to diagnose it
- Record freeze-frame data and scan live data for drive motor A phase Z current and related sensor faults to see when the high reading occurs.
- With the vehicle powered down as specified by the manufacturer, inspect the phase Z current sensor connector and wiring for corrosion, damage, loose pins, or signs of overheating.
- Check the connector terminals and sensor supply, ground, and signal wiring for poor contact or an open circuit, following the manufacturer's wiring information.
- Measure the phase Z sensor signal and compare it with the manufacturer's specification, checking whether the high reading remains with the circuit connected and during the specified isolation tests.
- If the wiring and connections pass, test the phase Z current sensor and replace it only if its output is outside the manufacturer's specification.
Common fixes
- Clean and secure corroded or loose phase Z sensor connector terminals.
- Repair damaged phase Z sensor wiring or a poor ground connection.
- Replace the drive motor A phase Z current sensor if its signal remains too high after wiring checks.
Can I keep driving?
Avoid hard acceleration and continued driving if motor power is reduced or the vehicle enters limp mode; it may shut down or lose drive. If warnings worsen or propulsion becomes unreliable, stop somewhere safe and arrange assistance.
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.