Fault Code Lookup › Powertrain codes › P0AA1
P0AA1 Powertrain · manufacturer code
P0AA1 fault code: what 3 owners reported
P0AA1 is a manufacturer-specific powertrain code (engine, transmission, fuel and emissions), so its exact definition belongs to the carmaker and is not in the generic OBD-II list. What it meant in practice is below, from 3 complaints owners filed with NHTSA. Updated November 3, 2026.
- 3owner reports
- 2car models
- 0mention a crash
- 0mention a fire
- 2017–2024model years
Which cars get code P0AA1?
Every model whose owners mentioned P0AA1 in a complaint, most reports first. Each year opens that car's full problem report. Popular models collect more reports because more of them are on the road.
Chrysler Pacifica
1 reportWhere does P0AA1 show up?
By brand
- Ford2
- Chrysler1
Component the owner filed it under
Is there a recall for P0AA1?
The others concern the component owners file this code under (Electrical System) on the same cars; they may or may not relate to the code. Recall repairs are free; check your VIN at nhtsa.gov/recalls.
Electrical System: Wiring: Connectors/Plugs/Receptacles Chrysler (FCA US, LLC) is recalling certain 2017-2023 Pacifica Plug-In Hybrid Electric vehicles (PHEVs). An internal transmission wiring connector may short circuit, resulting in an unexpected engine shutdown.
2017 Chrysler Pacifica. Full risk and remedy on each car's report.
Electrical System: 12v/24v/48v Battery Chrysler (FCA US LLC) is recalling certain 2017-2019 Pacifica vehicles equipped with engine stop/start systems. A loose battery ground connection may result in an intermittent loss of power steering assist and/or a stall.
2017 Chrysler Pacifica. Full risk and remedy on each car's report.
Electrical System: Wiring: Front Underhood Chrysler (FCA US LLC) is recalling certain 2018 Jeep Renegade, Compass and Grand Cherokee, RAM 1500 and Promaster, Fiat 500x, Dodge Journey, Challenger, Charger and Durango and Chrysler 300x vehicles, 2017-2018 Jeep Wrangler, Dodge Grand Caravan and Chrysler Town and Country vehicles and 2018-2019…
2017 Chrysler Pacifica. Full risk and remedy on each car's report.
Electrical System: Ignition: Anti-Theft: Control Module Chrysler (FCA US LLC) is recalling certain 2017-2018 Chrysler Pacifica vehicles. The Manual Park Release (MPR) plug may be removed without a tool. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 114, "Theft Protection."
2017 Chrysler Pacifica. Full risk and remedy on each car's report.
Electrical System: Wiring Chrysler (FCA US LLC) is recalling certain 2014-2018 Dodge Journey, Charger and Durango, RAM 2500, 3500, 3500 Cab Chassis (more than 10,000lb), 4500 Cab Chassis and 5500 Cab Chassis, Jeep Cherokee and Grand Cherokee and Chrysler 300, 2014-2019 RAM 1500, 2015-2018 Dodge Challenger, 2015-2017 Chrysler…
2017 Chrysler Pacifica. Full risk and remedy on each car's report.
Electrical System: Software Chrysler (FCA US LLC) is recalling certain 2017 Chrysler Pacifica vehicles equipped with a 3.6l engine. The engine control software may become out of sync with the crankshaft position sensor, possibly resulting in an engine stall.
2017 Chrysler Pacifica. Full risk and remedy on each car's report.
What happened when owners saw P0AA1?
3 of the 3 reports, spread across the models above, as the owners wrote them. NHTSA removes names and VINs; long reports are trimmed. CarHooq has not verified individual claims.
The HVBJB failed on my 2024 Ford Mustang Mach-e. I first noticed a dashboard warning regarding a powertrain malfunction when I tried to start the car about a half-hour after we returned home from an approximately 170-mile drive five days ago. The warning said it was a powertrain malfunction and to get service soon. The car started an hour later and I was able to drive it to the Ford Service center where I bought the new car only last June. There they diagnosed the problem with this language: "HV JUNCTION BOX - FOUND P0AA1:68 AND P0AA1:00 TO BE HARD SET AND THE TO BE IN LIMP MODE. NEED TO REPLACE HV JUNCTION BOX ( 414-03A PPT P4 ) AND RETEST ALL MODULES. WILL NEED MORE TIME AFTER REPAIR TO…
On 8/16/26, my 2017 Chrysler Pacifica Hybrid would not start after being parked for several hours in an underground parking structure in downtown Detroit during a baseball game. There were no warnings before the failure. The vehicle was towed to Serra Lake Orion at a cost of about $700. The dealer found diagnostic trouble code P0AA1 (hybrid/EV battery positive contactor circuit). The high-voltage system is locked down and the vehicle cannot be started or driven. The vehicle has been at the dealer since August 18, 2026, and as of 10/1/26 has been out of service for about 6 weeks. The dealer has an open Chrysler STAR technical support case (102974656) seeking approval to replace the…
Car was parked in my home garage and would not start, displaying "Stop safely now." Vehicle appears to have code P0AA1 Hybrid battery positive contactor - circuit stuck closed. Many other Mach-E vechicles are exhibiting this defective part in the high voltage battery system, which appears to be the Battery Electrical Control Module (BECM). Ford appears to be aware of this issue, and, unconfirmed, has stopped production of the Mach-E to canibalize parts to fix vehicles that fail. However, some are less lucky than me and had their car stop dead while driving on the highway, and Ford should not be waiting for vehicles to stop and strand people before fixing this serious defect. Please see here…
P0AA1: questions drivers ask
What does code P0AA1 mean?
P0AA1 is a manufacturer-specific powertrain code (engine, transmission, fuel and emissions), so its exact definition depends on the carmaker and is not in the generic OBD-II list. 3 owners reported it to NHTSA, most often for the Ford Mustang Mach-E (2), Chrysler Pacifica (1); their reports describe what happened.
Which cars get code P0AA1 most often?
In NHTSA owner complaints, P0AA1 is mentioned most for the Ford Mustang Mach-E (2), Chrysler Pacifica (1), across 2 models and model years 2017 to 2024. Popular models collect more reports because more of them are on the road.
Is there a recall for code P0AA1?
No NHTSA recall text names P0AA1 directly. 6 recalls on the cars that report this code concern the same component owners name most (Electrical System); they may or may not relate to the code. Check your VIN at nhtsa.gov/recalls.
What should I do if my car shows P0AA1?
Write down when the code appeared and what the car did (warning lights, loss of power, noises, speed, weather). Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer or independent workshop to read the stored freeze-frame data before anyone clears the code, and keep the repair order. If the car loses power in traffic, stop driving it. CarHooq does not diagnose: these are owner reports and official recall notices, not repair advice.
How this page was made
CarHooq read the text of every owner complaint filed with NHTSA for 19 US and European brands (model years 2012 onwards) and picked out the diagnostic trouble codes owners wrote down. This page lists every mention of P0AA1. Manufacturer codes have no public standard definition, so CarHooq shows only what owners reported. Nothing here is a diagnosis. Data: NHTSA Office of Defects Investigation (public domain), retrieved November 3, 2026. How CarHooq reports are made.
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