P0E8D: Drive Motor A Inverter Voltage Sensor B Circuit Range/Performance

P0E8D says that voltage sensor B of the drive motor A inverter delivers a value that is electrically fine but disagrees with other readings of the same bus. Mitsubishi details the check for the 2023 Outlander PHEV, where sensor B is the main channel at capacitor 2 (V2M): with the boost converter switched off and the unit powered with 8 V or more for 0.5 s, a gap of at least 100 V to the rear motor unit, or of at least 50 V to capacitor 1, lasting 0.2 s sets the code, and the hint points to the power drive unit. Audi lists P0E8D00 with P0C0C00 in the electric drive of 2025-2026 Q6 and A6 e-tron models; if all entries appear together with a red high-voltage warning, the power electronics are replaced. Hard circuit faults are P0E8C, P0E8E and P0E8F.

Symptoms

• Red high-voltage system warning at start, stop safely (Audi)
• MIL and hybrid warning, reduced or no electric drive

Most likely causes

• Fault in the power electronics or its voltage measurement (Mitsubishi, Audi)
• Drift of voltage channel B so that it no longer matches the other channels
• Wrong reference value from another high-voltage unit (rear motor unit, battery management)

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

• It can trigger limp mode.
• It affects emissions.

What each character of P0E8D means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• E: Subsystem depends on the code range
• 8D: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0E8D?

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 P0E8D?

The most common causes are: fault in the power electronics or its voltage measurement (Mitsubishi, Audi); drift of voltage channel B so that it no longer matches the other channels; wrong reference value from another high-voltage unit (rear motor unit, battery management).

Related codes

• P0E8CDrive Motor A Inverter Voltage Sensor B Circuit
• P0E8EDrive Motor A Inverter Voltage Sensor B Circuit Low
• P0E8FDrive Motor A Inverter Voltage Sensor B Circuit High
• P0D2EDrive Motor A Inverter Voltage Sensor A Circuit Range/Performance
• P2E1ADrive Motor A Inverter Voltage Sensor A/B Correlation
• P0C0CDrive Motor A Inverter Power Supply Circuit Low

Sources

• mitsubishitechinfo.com: N503240390000700USA
• static.nhtsa.gov: MC 11032197 0001
• static.nhtsa.gov: MC 11033502 0001

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.