2017 Pacifica Hybrid isolation/no-restart: BPCM software distinction. See the manufacturer document, vehicle conditions, exclusions and questions for a qualified shop before assuming a repair.
This is a research summary of a manufacturer communication, not a diagnosis for your car, a DIY repair procedure or confirmation of warranty or recall eligibility. No qualified technician has approved a repair for your individual vehicle here.
This historical communication is conditional. The current revision, VIN/build eligibility, measured diagnosis and any warranty or recall decision are not established here. Ask the manufacturer or a qualified shop to check the complete current document.
Read the FCA US original: Pacifica BPCM flash and false isolation indication · Check open recalls by VIN at NHTSA Source date: document date not recorded; research checked: 2026-11-01.
What prompted this manufacturer document
- MIL
- May not restart after switching off
- The bulletin explains that a vehicle-side P0AA6 condition may cause an erroneous battery-side P1E1B indication at key-off. It does not declare the original isolation condition harmless.
Which vehicle conditions must be checked
Each row below retains its own conditions. Do not combine engines, years or models across rows to create new applications. A listed model is not proof that a particular VIN is affected.
- Chrysler Pacifica Hybrid · 2017 · 3.6L V6 hybrid EH3; PHEV; E flite SI-EVT DFQ; 2017-07-19
Codes recorded in this document
A root listed only as an appearance has no separately verified meaning here. Preserve every suffix and module name; a shared root does not transfer a repair branch to another vehicle.
| Root | Raw form | Meaning in this source, if established |
|---|---|---|
| P0AA1 | P0AA1-00 | Positive high-voltage battery contactor indicated stuck closed |
| P0AA6 | P0AA6-00 | Hybrid-battery voltage-system isolation fault |
| P1E1B | P1E1B-00 | Battery-side high-voltage isolation indication |
| U11C5 | U11C5-00 | BPCM communication loss with onboard charging module |
| P1A9B | P1A9B-00 | Battery temperature sensor 1 above expected range |
| P1AA7 | P1AA7-00 | Battery temperature sensor 4 above expected range |
What an owner can record safely
- Full suffix-bearing codes before key cycles or clearing
- Whether the car failed to restart after a warning
- Prior software and battery-service history
Editorial safety boundary for this system
Do not continue driving with loss-of-propulsion, isolation or serious battery warnings; obtain model-specific roadside guidance.
- Use current model-specific service information, calibrated equipment and a qualified technician for the selected diagnostic branch.
- Do not open the traction pack, touch orange cables or damaged connectors, bypass interlocks, or perform home insulation testing.
This is a conservative editorial policy, not a manufacturer safe-to-drive decision for a specific vehicle.
What the source does not prove
- Do not label the entire traction battery defective from P1E1B alone, or ignore a real isolation fault because software is involved.
- A code or message alone does not establish a failed part, a safe-to-drive decision or an approved repair for this VIN.
- A service bulletin is not automatically a recall or free warranty repair. Confirm current eligibility directly.
Questions for the repair shop
- Which current manufacturer procedure, VIN/RPO/build gate and test result determine the diagnostic branch?
- Does a later revision or a current recall change the source's original advice?
- What measurement or inspection confirms the cause, and how will the repair be verified?
Read the original record
The linked communication may be revised after the research date. Compare its document number, exact vehicle table, diagnostic preconditions and exclusions with a qualified technician. This page paraphrases selected facts and does not reproduce the manufacturer procedure.
Sources and scope
- FCA US — Pacifica BPCM flash and false isolation indication (08-043-17 Rev B) Document: date not recorded · Research checked: 2026-11-01
Research snapshot: 2026-11-01. Source documents may have newer revisions. Verify current instructions and VIN eligibility with the manufacturer.