P2C70: Drive Motor "A" Phase Z Current Low

Phase Z current of drive motor A is below the expected window. Indicates open winding, short, or sensor offset.

Symptoms

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

Most likely causes

• Phase winding partially open
• Current sensor offset drifted

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. With the connector unplugged, check whether the signal wire is making contact with ground.
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 P2C70 means

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

Frequently asked questions

Can I keep driving with code P2C70?

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 P2C70?

The most common causes are: phase winding partially open; current sensor offset drifted.

Related codes

• P2C6DDrive Motor "A" Phase Y Current Low
• P2C6ADrive Motor "A" Phase X Current Low

Sources

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

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.