P2E27: Drive Motor A Phase X-Y-Z Current Sensor Correlation

The phase X, Y, and Z current sensors of drive motor A do not correlate within the calibrated tolerance. Sum of phase currents should be near zero.

Symptoms

• EV/hybrid system warning light on
• Reduced motor power or torque
• Possible limp mode or vehicle shutdown

Most likely causes

• One sensor offset drifted
• Ground offset between sensors

What to check, in order

Start with the simplest. You can tick off each step.

1. Read the codes with a hybrid-compatible scanner and write down the freeze frame data
2. Compare both signals at the same time in live data and check any recent installation work.
3. Make sure the battery cooling air intake is clean
4. Check the 12 V auxiliary battery, which can also trigger warnings
5. Leave any high-voltage measurements to a specialized repair shop

Good to know

• Repair difficulty: hard
• It can trigger limp mode.

What each character of P2E27 means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• E: Subsystem depends on the code range
• 27: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2E27?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P2E27?

The most common causes are: one sensor offset drifted; ground offset between sensors.

Related codes

• P0BFEDrive Motor B Phase U-V-W Current Sensor Correlation
• P0BFDDrive Motor A Phase U-V-W Current Sensor Correlation

Sources

• github.com: dtc database
• en.wikipedia.org: Brushless DC electric motor

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.