P0CA3

DC/DC Converter Step Up Voltage Performance

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$167–556 (est.)

Symptoms

Check Engine light comes on
Hybrid system power reduction
Problems with charging a high-voltage battery
Unstable operation of the vehicle's electrical system
The car may go into emergency mode

Causes

DC/DC converter malfunction
Problems with high voltage battery
Open or short circuit in control circuit
Malfunction of voltage sensors
Control unit software error

How to Fix

Diagnostics of DC/DC converter
Checking the integrity of high-voltage circuits
Voltage Sensor Testing
Control unit software update
Replacing the DC/DC converter if necessary

Related codes

P0CA0 P0CA1 P0CA2