P0AA2 on 2022-2024 Ford F-150 Lightning — Hybrid/EV Battery Positive Contactor Circuit
1 vehicles · 1 makes
Most Reported On
P0AA2 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2022-2024 Ford F-150 Lightning.
Common Causes
Diagnostic Tools
To diagnose P0AA2, you'll need an OBD-II scanner. Here are our recommendations at every price point.
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FAQ
What does P0AA2 mean?
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.
What are the most common causes of P0AA2?
The most common causes of P0AA2 are: 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. The specific cause varies by vehicle.
How much does it cost to fix P0AA2?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P0AA2?
Au7o has documented P0AA2 across 1 vehicle models from 1 manufacturers: Ford.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.