Fault Code Lookup › Powertrain codes › P0A78
P0A78 Powertrain · generic range, no listed definition
P0A78 fault code: what 8 owners reported
P0A78 sits in the generic powertrain range (engine, transmission, fuel and emissions), but its SAE definition is not in CarHooq's list, so this page shows only what owners reported. What it meant in practice is below, from 8 complaints owners filed with NHTSA. Updated November 9, 2026.
- 8owner reports
- 3car models
- 0mention a crash
- 0mention a fire
- 2019–2024model years
Which cars get code P0A78?
Every model whose owners mentioned P0A78 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.
Where does P0A78 show up?
By brand
- Chrysler6
- Chevrolet1
- Ram1
Component the owner filed it under
Is there a recall for P0A78?
As of November 9, 2026, no NHTSA recall on the cars reporting P0A78 names this code or its most-reported component. Recalls can be issued at any time: check your VIN at nhtsa.gov/recalls.
What happened when owners saw P0A78?
8 of the 8 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.
Driving on the interstate at high speed, when check engine light comes on, warning message - Stop Safely Vehicle Will Shut Off - and red turtle warning indicator (limp mode). After a short time, vehicle will no longer accelerate. I pulled over to the shoulder, stopped and shut off engine. Restarted after a few minutes and everything appeared to work fine, with check engine light on. About 15 minutes later, it happened again. The dealership serviced the vehicle. Found error code P0A78 for driver moteo "A" inverter performance. Used Stellantis Technical Service Bulletin 08-253-24 to diagnose (both modules were out of date) and complete the indicated updates. This is a known issue that has…
I HAVE A 2019 BOLT EV (MILEAGE APPROXIMATELY 10K) THAT AUTOMATICALLY SHIFTED GEAR TO "PARK" MODE FROM THE "L" MODE AND SLOWED TO AN ALMOST STOP WHILE I WAS ON THE HIGHWAY AT RUSH HOUR DRIVING APPROXIMATELY 65 MI/HR. I WAS ABLE TO SAFELY STEER THE CAR TO A MEDIAN AND CALL ON STAR AFTER REPEATEDLY SHUTTING POWER OFF AND BACK ON AGAIN. I WAS ABLE TO CONNECT WITH ON STAR FOR LIVE DIAGNOSTICS SHOWING A FAILURE IN THE HYBRID CONTROL PROCESSOR (P0A78). I ARRANGED FOR THE VEHICLE TO BE TOWED TO THE NEAREST DEALERSHIP AND HAS BEEN UNDER REPAIR FOR THE PAST TWO WEEKS. GM SENT THE DEALER A "CONTROL MODULE" AS REPLACEMENT BUT THIS DIDN'T FIX THE PROBLEM. RECENTLY, THE DEALER CALLED TO INFORM ME THAT THE…
…They hooked up the code reader for the check engine light which showed error code: P0A78 - Drive Motor A Inverter Performance, leaving me unable to drive the truck home as it is unsafe to drive at this point for fear the truck would lose power while under way. As it stands, truck is at the dealership awaiting further diagnostics for the same issue that’s been happening since I bought the truck new in December, 2021.
This 2021 Chrysler Pacifica Hybrid has a severe and recurring history of catastrophic high-voltage hybrid powertrain and transmission failures that cause a sudden loss of motive power while driving, presenting an immediate safety hazard. The vehicle has already required two full automatic transmission (eFlite EVT) replacements under factory warranty due to internal failures. It has experienced multiple high-voltage component repairs, including software modules for the power inverter. The vehicle is currently experiencing a recurring failure and is displaying active diagnostic trouble code P0A78 (Drive Motor "A" Inverter Performance), indicating a critical fault in the high-voltage hybrid…
While driving in the carpool lane on the freeway, the vehicle displayed “Stop Safely. Vehicle Will Shut Off Soon” and lost all power. I am pregnant and had four children (ages [XXX] , [XXX] , [XXX] , and [XXX] ) in the vehicle. The outside temperature was over 100°F, and we were two hours from home. The car was completely disabled in heavy traffic, creating an extreme safety risk for my family. After waiting about 15–20 minutes, the vehicle restarted and we were able to continue. A code scan showed P0A78 – Drive Motor “A” Inverter Performance. This is a serious safety concern, and I am requesting immediate inspection and repair under warranty. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF…
…At the dealership, they identified three diagnostic codes: B1945-13 B10EB-00 P0A78-00 While they performed a recall-related firmware update, the underlying concern remains: What if this failure had occurred on a freeway, in adverse weather conditions, or with my family aboard? More concerning is the discovery that this isn't an isolated incident. Similar reports are appearing across owner forums and social media, suggesting this is a widespread issue affecting Chrysler's hybrid vehicles. Despite apparent awareness of the problem, Chrysler has yet to implement a comprehensive fix. As a new hybrid vehicle owner, this experience raises serious questions about vehicle safety and manufacturer…
…The vehicle is displaying a code of P0A78. The vehicle is set to be towed to the dealer tomorrow for evaluation. I have photos documenting the warning message and error codes if needed. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
…An employee identified a code, P0A78, which he indicated might be an issue, but he could not be sure without further diagnostics. He indicated that the error code did not create a concern that driving the Vehicle would damage its engine. We got back in the Vehicle and resumed our trip. About half an hour later, the Vehicle engine again shut off. Again, the dashboard did not give advance warning before shutting off, such that I had to again coast the Vehicle to a stop in the shoulder. After about 5 or 10 minutes, I was able to get the Vehicle started again, and I was able to drive it back to the service department. The service department let me know it believed that the Vehicle’s transmission…
P0A78: questions drivers ask
What does code P0A78 mean?
P0A78 sits in the generic powertrain range (engine, transmission, fuel and emissions), but its SAE definition is not in CarHooq's list, so CarHooq shows only what owners reported. 8 owners reported it to NHTSA, most often for the Chrysler Pacifica (6), Chevrolet Bolt EV (1), Ram 1500 (1); their reports describe what happened.
Which cars get code P0A78 most often?
In NHTSA owner complaints, P0A78 is mentioned most for the Chrysler Pacifica (6), Chevrolet Bolt EV (1), Ram 1500 (1), across 3 models and model years 2019 to 2024. Popular models collect more reports because more of them are on the road.
Is there a recall for code P0A78?
As of November 2026, no NHTSA recall on the cars reporting P0A78 names this code or its most-reported component. Recalls can be issued at any time, so check your VIN at nhtsa.gov/recalls.
What should I do if my car shows P0A78?
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 P0A78. The code is in a generic range but its standard definition is not in CarHooq's list, so CarHooq shows only what owners reported. Nothing here is a diagnosis. More answers: the fault code FAQ. Data: NHTSA Office of Defects Investigation (public domain), retrieved November 9, 2026. How CarHooq reports are made.
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