P0A12

DC/DC Converter Enable Circuit Low

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$167–556 (est.)

Symptoms

Hybrid system warning light on dashboard
Reduced vehicle power or performance
Problems with charging a high-voltage battery
Unstable operation of on-board electronics
The car goes into emergency mode

Causes

Open or short circuit in the DC/DC converter control circuit
Poor connection or corrosion in connectors
Faulty DC/DC converter
Problems with the hybrid control module (HCU)
Wiring harness damage

How to Fix

Check the integrity of the DC/DC converter control circuit
Inspect and clean all connectors associated with the DC/DC converter
Check voltage and resistance in control circuit
Replace the DC/DC converter if necessary
Check and replace the Hybrid Control Module (HCU) if necessary.

Related codes

P0A13 P0A14 P0A15