P0A78 on Chrysler vehicles
P0A78 is named on 13 Chrysler model years (2019–2025): 30 manufacturer filings and 5 owner reports in NHTSA’s files, across Pacifica, Voyager.
Which Chrysler model years name P0A78
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2024 Chrysler Pacifica | Electrical System | 4 | 2 |
| 2021 Chrysler Pacifica | Electrical System | 4 | 2 |
| 2023 Chrysler Pacifica | Electrical System | 4 | 1 |
| 2025 Chrysler Pacifica | Electrical System | 3 | — |
| 2022 Chrysler Pacifica | Electrical System | 3 | — |
| 2020 Chrysler Pacifica | Electrical System | 3 | — |
| 2019 Chrysler Pacifica | Electrical System | 3 | — |
| 2025 Chrysler Voyager | Electrical System | 1 | — |
| 2024 Chrysler Voyager | Electrical System | 1 | — |
| 2023 Chrysler Voyager | Electrical System | 1 | — |
| 2022 Chrysler Voyager | Electrical System | 1 | — |
| 2021 Chrysler Voyager | Electrical System | 1 | — |
| 2020 Chrysler Voyager | Electrical System | 1 | — |
A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
What Chrysler owners said
Source: NHTSA complaint databaseOwners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.
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 propulsion system
Chrysler filings that name P0A78
Source: NHTSA manufacturer communicationsBulletins and campaigns Chrysler filed with NHTSA whose summary names P0A78. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- 9100801 Service bulletin2026-04-24 · Electrical System
- If the vehicle comes in with any of the following P codes, please refer to the active TSBs for HCP/AHCP flash BEFORE ordering PIM P0A78 - Drive Motor A Inverter Performance. P0A79 - Drive Motor B Inverter Performance. P0A3F-00 - Drive Motor A Position Sensor 1 Circuit. P0A43-00 - Drive Motor A Position Sensor Circuit Intermittent. P0A45-00 - Drive Motor B Position Sensor 1 Circuit. P0C1A-00 - Driv
- 08-209-24 Service bulletin2024-09-26 · Electrical System
- "Flash: Hybrid Control Processor (HCP) and Auxiliary Hybrid Control Processor (AHCP) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0A78 - Drive Motor A Inverter Performance. ● P0A79 - Drive Motor B Inverter Performance. Customers may also experience the following: ●
- 9100801 Service bulletin2026-04-17 · Electrical System
- If the vehicle comes in with any of the following P codes, please refer to the active TSBs for HCP/AHCP flash BEFORE ordering PIM P0A78 - Drive Motor A Inverter Performance. P0A79 - Drive Motor B Inverter Performance. P0A3F-00 - Drive Motor A Position Sensor 1 Circuit. P0A43-00 - Drive Motor A Position Sensor Circuit Intermittent. P0A45-00 - Drive Motor B Position Sensor 1 Circuit. P0C1A-00 - Driv
- 08-253-24 Service bulletin2024-12-13 · Electrical System
- "Flash: Hybrid Control Processor (HCP) and Auxiliary Hybrid Control Processor (AHCP) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P0A78 - Drive Motor A Inverter Performance. ● P0A79 - Drive Motor B Inverter Performance.** ● P0A33 - Drive Motor B Temperature Sensor
- 08-208-24 Service bulletin2024-09-26 · Electrical System
- "Flash: Hybrid Control Processor (HCP) and Auxiliary Hybrid Control Processor (AHCP) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0A78 - Drive Motor A Inverter Performance. ● P0A79 - Drive Motor B Inverter Performance. Customers may also experience the following: ●
What P0A78 means
Source: SAE J2012 / OBD-IIP0A78 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
A stored code names the test that failed, never the part that caused it. The record above is what Chrysler and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs P0A78 a known problem on Chrysler vehicles?
It is a documented one: NHTSA's files hold 30 manufacturer filings and 5 owner reports naming P0A78 on 13 Chrysler model years (2019–2025). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Chrysler models does P0A78 appear on most?
2024 Pacifica (6 documents), 2021 Pacifica (6 documents), 2023 Pacifica (5 documents).
Does P0A78 on a Chrysler mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.