P0A11 Possible Causes
- Faulty DC/DC converter
- DC/DC converter harness is open or shorted
- Poor electrical connection in the DC/DC converter circuit
- Faulty Powertrain Control Module (PCM)
What Does It Mean?
How to Fix Code P0A11
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P0A11 Possible Symptoms
Illuminated engine light (or service engine soon warning light)
P0A11 Meaning
The Powertrain Control Module (PCM) controls the hardwired DC/DC enable signal to turn the DC/DC converter on and off. The DC/DC converter provides feedback to the PCM using the hardwired DC/DC fault signal. The DC/DC fault signal informs the PCM when the converter is not operational or when a fault has occurred.