P2E20: Drive Motor A Phase Y Current Sensor Circuit Range/Performance

The current sensor for drive motor A phase Y reports a circuit range/performance fault. Phase current measurement is unreliable.

Symptoms

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

Most likely causes

• Current sensor failed
• Wiring fault
• Sensor element aged beyond calibration window

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 the reading with other engine data while varying the engine speed.
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 P2E20 means

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

Frequently asked questions

Can I keep driving with code P2E20?

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 P2E20?

The most common causes are: current sensor failed; wiring fault; sensor element aged beyond calibration window.

Related codes

• P2E1CDrive Motor A Phase X Current Sensor Circuit Range/Performance
• P2E24Drive Motor A Phase Z Current Sensor Circuit Range/Performance
• P0BFADrive Motor B Phase W Current Sensor Circuit Range/Performance
• P0BF6Drive Motor B Phase V Current Sensor Circuit Range/Performance
• P0BF2Drive Motor B Phase U Current Sensor Circuit Range/Performance
• P0BEEDrive Motor A Phase W Current Sensor Circuit Range/Performance
• P0BEADrive Motor A Phase V Current Sensor Circuit Range/Performance
• P0BE6Drive Motor A Phase U Current Sensor Circuit Range/Performance

Sources

• github.com: dtc database
• en.wikipedia.org: Power inverter
• 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.