P0C7A

Drive Motor B Inverter Voltage Too High

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$167–889 (est.)

Symptoms

Check Engine light comes on
Hybrid system power reduction
The car goes into emergency mode
Unusual sounds from an electric motor
Problems with regenerative braking

Causes

Motor inverter fault B
Problems in the high voltage circuit
Oxidation or damage to contacts
Malfunction of voltage sensors
HPCM module software error

How to Fix

Check the condition of the high voltage circuit
Test motor inverter B
Check contacts and connections
Update HPCM firmware (if available)
Replace the faulty inverter if necessary

Related codes

P0C7B P0C79 P0AFA