Chrysler P0A78
Drive A Inverter Performance. U0415-00 - Implausible Data Received From ABS. P0A3F-00 - Drive Motor A Position Sensor 1 Circuit. P061B
Quick answer
For a 2017 Chrysler Pacifica in the US, P0A78-00 is identified in an official Chrysler/NHTSA manufacturer communication as “Drive A Inverter Performance.” The same communication also references U0415-00, P0A3F-00, and P061B, and states that software was updated to better address the listed DTCs.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
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1. What does P0A78 mean?
For a 2017 Chrysler Pacifica in the US, P0A78-00 is identified in an official Chrysler/NHTSA manufacturer communication as “Drive A Inverter Performance.” The same communication also references U0415-00, P0A3F-00, and P061B, and states that software was updated to better address the listed DTCs.
2. Technical explanation
Verified evidence identifies P0A78-00 as Drive A Inverter Performance. The official communication groups it with U0415-00 (Implausible Data Received From ABS), P0A3F-00 (Drive Motor A Position Sensor 1 Circuit), and P061B. It specifically states that software had been updated to better address these DTCs. The supplied evidence does not establish a component-level failure cause, diagnostic procedure, or whether every listed code must be present together.
3. What system is affected?
Drive A inverter performance is identified by the verified DTC description. The supplied evidence also references ABS data plausibility and the Drive Motor A position-sensor circuit through companion codes.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
Not yet established by verified evidence.
6. Possible causes
- Not yet established by verified evidence. The official manufacturer communication states that software was updated to better address P0A78-00 and the associated listed DTCs, but it does not establish a specific hardware or wiring cause in the supplied evidence.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Arrange professional diagnosis by a Chrysler-qualified service facility.
- Record all stored diagnostic trouble codes, including whether U0415-00, P0A3F-00, or P061B are also present.
- Do not attempt high-voltage inverter, motor, or position-sensor repairs yourself.
10. Step-by-step troubleshooting
- Have a qualified service facility confirm the exact stored DTC suffixes and any companion codes.
- Have the facility check whether the software update described in the official manufacturer communication applies to the vehicle.
- Not yet established by verified evidence: further test steps, wiring tests, sensor tests, or inverter replacement criteria.
11. When to contact service
Service consultation is appropriate because the verified official communication identifies a software update intended to better address P0A78-00 and the related listed DTCs. Applicability of the communication and update must be confirmed by a Chrysler service facility using the vehicle identification number and current vehicle software status.
12. What the service center may check
- Confirm P0A78-00 and document any accompanying U0415-00, P0A3F-00, and P061B codes.
- Determine whether the vehicle is a 2017 Chrysler Pacifica for the US market.
- Check for the applicable software update referenced by the official manufacturer communication.
13. Possible repair or resolution
- The verified manufacturer communication states that software was updated to better address P0A78-00, U0415-00, P0A3F-00, and P061B.
- Not yet established by verified evidence: the exact update procedure, module target, post-update validation, or whether any parts replacement is required.
14. Affected vehicles
- Chrysler Pacifica · 2017 · US
15. Related TSBs / service bulletins
- NHTSA Manufacturer Communication 10224727: 0804417, published August 5, 2017. It states that software was updated to better address P0A79-00, P0A78-00, U0415-00, P0A3F-00, and P061B.
16. Recall information
- Not yet established by verified evidence. No recall information was supplied.
17. Official manufacturer information
Verified official source: NHTSA Manufacturer Communication 10224727: 0804417, https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2015-2019.zip#nhtsa_id=10224727. Supplied applicability evidence is limited to 2017 Chrysler Pacifica, US market.
- NHTSA: NHTSA Manufacturer Communication 10224727: 0804417 · official_tsb
19. Frequently asked questions
What does P0A78-00 mean on a 2017 Chrysler Pacifica?
The verified DTC description is Drive A Inverter Performance.
Is there an official service communication related to P0A78-00?
Yes. NHTSA Manufacturer Communication 10224727 states that software was updated to better address P0A78-00 and several listed associated DTCs.
Which other codes are referenced with P0A78-00 in the official communication?
The supplied communication references P0A79-00, U0415-00, P0A3F-00, and P061B.
Can I drive or charge with P0A78-00?
Not yet established by verified evidence.