P0AF0 on Cadillac
Hybrid Battery System Voltage
P0AF0 on Cadillac vehicles indicates hybrid battery system voltage. Au7o has documented this code across 1 Cadillac model — most commonly on ELR. This hybrid/electric powertrain code relates to a detected problem in the high-voltage hybrid battery system's voltage monitoring. The vehicle's controller continuously watches the battery pack's voltage to keep it within safe operating limits and to coordinate charging and electric drive. When the measured voltage or the monitoring circuit falls outside expected parameters, the code is set. Because exact definitions vary by manufacturer for codes in this range, it should be diagnosed with the factory service information; expect a hybrid warning light and possibly reduced electric assist. Always observe high-voltage safety precautions when servicing.
Common Causes of P0AF0
- •Weak or degraded hybrid battery cells/modules
- •Faulty battery voltage sense circuit or sensor
- •Damaged or corroded high-voltage connectors/wiring
- •Faulty battery management/control module
- •Poor cooling causing battery imbalance
- •Low 12V auxiliary battery affecting module operation
- •Inverter or related high-voltage component fault
P0AF0 on Cadillac by Model
Cadillac ELR(1 issue)
- Onboard Charger and EVSE Communication Failures2014-2016
The ELR, based on the Chevrolet Volt platform, experiences onboard charger failures and communication issues with Level 2 EVSEs. The charging module may fail to initiate charging, stop mid-charge, or throw fault codes. The 120V Level 1 EVSE included with the car is also known to have reliability issues.
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View P0AF0 across all makes →Frequently Asked Questions
What does P0AF0 mean on Cadillac?▼
P0AF0 stands for "Hybrid Battery System Voltage." This hybrid/electric powertrain code relates to a detected problem in the high-voltage hybrid battery system's voltage monitoring. The vehicle's controller continuously watches the battery pack's voltage to keep it within safe operating limits and to coordinate charging and electric drive. When the measured voltage or the monitoring circuit falls outside expected parameters, the code is set. Because exact definitions vary by manufacturer for codes in this range, it should be diagnosed with the factory service information; expect a hybrid warning light and possibly reduced electric assist. Always observe high-voltage safety precautions when servicing. On Cadillac specifically, this code is documented across 1 model.
What causes P0AF0 on Cadillac vehicles?▼
Common causes on Cadillac: Weak or degraded hybrid battery cells/modules, Faulty battery voltage sense circuit or sensor, Damaged or corroded high-voltage connectors/wiring, Faulty battery management/control module, Poor cooling causing battery imbalance. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0AF0 on a Cadillac?▼
Repair costs vary widely depending on the root cause and specific Cadillac model.
Which Cadillac models have P0AF0 documented?▼
Au7o has documented P0AF0 on 1 Cadillac model: ELR.