P0AFA on Honda
14V Power Module System Voltage
P0AFA on Honda vehicles indicates 14v power module system voltage. Au7o has documented this code across 1 Honda model — most commonly on CR-V. P0AFA is a hybrid/electric vehicle code indicating the computer detected low voltage in the 14-volt power module system — the converter that supplies the conventional 12V/14V electrical system in a hybrid or EV (the equivalent of a traditional alternator). The 14V power module (often a DC-DC converter) steps down the high-voltage battery to power lights, accessories, and the auxiliary 12V battery. When the monitored output voltage falls below the expected threshold, this code is set. It generally indicates the low-voltage electrical system isn't being properly charged, which can lead to a dead 12V battery and a no-start condition.
Common Causes of P0AFA
- •Failing DC-DC converter / 14V power module
- •Weak or failing auxiliary 12V battery
- •Corroded or loose 12V battery terminals and ground connections
- •Damaged wiring or connectors in the low-voltage charging circuit
- •Excessive electrical load draining the system
- •Fault in the high-voltage battery supply to the converter
- •Internal control module or software fault
P0AFA on Honda by Model
Honda CR-V(1 issue)
- High-Voltage Battery Terminal/Busbar Fracture — Spark, Fire, and Loss of Drive Power (Recall 24V745000)2023
A small number of early-build 2023 CR-V Hybrid vehicles (assembled Oct 6, 2022 - Jan 24, 2023) have high-voltage traction battery modules supplied by Panasonic with insufficient copper cladding thickness on negative terminals. The terminal or busbar inside the pack can fracture and spark, increasing the risk of injury or fire, and can cause a sudden loss of drive power. Honda issued NHTSA recall 24V745000 covering 98 vehicles. Although the population is small, the failure mode (HV battery spark/fire plus loss of propulsion) is high severity.
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View P0AFA across all makes →Frequently Asked Questions
What does P0AFA mean on Honda?▼
P0AFA stands for "14V Power Module System Voltage." P0AFA is a hybrid/electric vehicle code indicating the computer detected low voltage in the 14-volt power module system — the converter that supplies the conventional 12V/14V electrical system in a hybrid or EV (the equivalent of a traditional alternator). The 14V power module (often a DC-DC converter) steps down the high-voltage battery to power lights, accessories, and the auxiliary 12V battery. When the monitored output voltage falls below the expected threshold, this code is set. It generally indicates the low-voltage electrical system isn't being properly charged, which can lead to a dead 12V battery and a no-start condition. On Honda specifically, this code is documented across 1 model.
What causes P0AFA on Honda vehicles?▼
Common causes on Honda: Failing DC-DC converter / 14V power module, Weak or failing auxiliary 12V battery, Corroded or loose 12V battery terminals and ground connections, Damaged wiring or connectors in the low-voltage charging circuit, Excessive electrical load draining the system. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0AFA on a Honda?▼
Repair costs vary widely depending on the root cause and specific Honda model.
Which Honda models have P0AFA documented?▼
Au7o has documented P0AFA on 1 Honda model: CR-V.