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P2C94: Hybrid/EV Battery Contactor Control Supply Circuit/Low

The supply circuit for the hybrid battery contactor control reports a low condition. Contactor coils may not energise as expected.

High severity. Can I keep driving?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.

Symptoms

  • EV/hybrid system warning light on
  • Reduced power output or limp mode
  • Charging may fail or be slowed
  • Reduced electric range

Most likely causes

  • Supply wire shorted to ground
  • Supply rail collapses under load
  • Pack cell imbalance approaching service threshold

What to check, in order

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

Good to know

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

What each character of P2C94 means

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

Frequently asked questions

Can I keep driving with code P2C94?

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 P2C94?

The most common causes are: supply wire shorted to ground; supply rail collapses under load; pack cell imbalance approaching service threshold.

Sources

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.