P0AA2 on Ford
Hybrid/EV Battery Positive Contactor Circuit
P0AA2 on Ford vehicles indicates hybrid/ev battery positive contactor circuit. Au7o has documented this code across 1 Ford model — most commonly on F-150 Lightning. This is a high-voltage code for hybrid and electric vehicles indicating a problem with the positive contactor circuit for the traction (HV) battery. Contactors are large relay-like switches that connect and disconnect the high-voltage battery from the rest of the electric drive system, and the positive contactor handles the positive battery terminal. The hybrid/EV control computer sets this code when it can't properly control or verify this contactor's circuit — often when it appears stuck open or unresponsive. It generally indicates an electrical fault in the high-voltage power-up path and can prevent the vehicle from powering on or driving. CAUTION: high-voltage systems are dangerous and should be serviced by qualified technicians.
Common Causes of P0AA2
- •Faulty or stuck positive HV battery contactor
- •Damaged contactor control wiring or connectors
- •Blown fuse in the high-voltage or contactor control circuit
- •Poor ground or power supply to the contactor
- •Corroded or loose high-voltage battery connections
- •Faulty hybrid/EV (HV) control module or battery ECU
- •Internal high-voltage battery fault
P0AA2 on Ford by Model
Ford F-150 Lightning(1 issue)
- DC Fast Charging Faults and Reduced Charging Speed2022-2024
Many Ford F-150 Lightning owners report persistent issues with DC fast charging, including charge fault errors, unexpectedly slow charging speeds, and sessions that terminate prematurely. Some vehicles charge at only 40-70kW at stations rated for 150-350kW. The charging speed often drops dramatically after 2-5 minutes at a fast charger, settling well below the advertised 150kW peak rate. The battery charging control module (BCCM) can develop faults that prevent DC fast charging entirely, displaying an orange charge ring and "Vehicle Charging Fault" errors. Ford has released software updates to improve charging performance, but many owners continue to experience issues.
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View P0AA2 across all makes →Frequently Asked Questions
What does P0AA2 mean on Ford?▼
P0AA2 stands for "Hybrid/EV Battery Positive Contactor Circuit." This is a high-voltage code for hybrid and electric vehicles indicating a problem with the positive contactor circuit for the traction (HV) battery. Contactors are large relay-like switches that connect and disconnect the high-voltage battery from the rest of the electric drive system, and the positive contactor handles the positive battery terminal. The hybrid/EV control computer sets this code when it can't properly control or verify this contactor's circuit — often when it appears stuck open or unresponsive. It generally indicates an electrical fault in the high-voltage power-up path and can prevent the vehicle from powering on or driving. CAUTION: high-voltage systems are dangerous and should be serviced by qualified technicians. On Ford specifically, this code is documented across 1 model.
What causes P0AA2 on Ford vehicles?▼
Common causes on Ford: Faulty or stuck positive HV battery contactor, Damaged contactor control wiring or connectors, Blown fuse in the high-voltage or contactor control circuit, Poor ground or power supply to the contactor, Corroded or loose high-voltage battery connections. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0AA2 on a Ford?▼
Repair costs vary widely depending on the root cause and specific Ford model.
Which Ford models have P0AA2 documented?▼
Au7o has documented P0AA2 on 1 Ford model: F-150 Lightning.