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Chrysler P1A29-00

Owner complaint no start Mil lamp on. Technician Observed Mil lamp on and DTC’s P1A2A-00, P1A29-00 Supervisory Circuits. Repair Procedure: 2017- 2018 PHEV vehicles have may be link

Common search variants: P1A2900 · P1A29 00 · P1A29_00 · Search ignores case and common separators.

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact an authorized Chrysler/FCA dealer or qualified service facility, particularly if the vehicle will not start or crank and the MIL is on.
Confidence95%

Quick answer

For 2017–2018 Chrysler Pacifica PHEV vehicles in the United States, DTC P1A29-00 is documented by FCA/NHTSA communication S2008000019 with no-start/no-crank and MIL-on reports, often alongside P1A2A-00. FCA states the condition may be linked to multiple recalls or service actions requiring module updates.

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 P1A29-00 mean?

For 2017–2018 Chrysler Pacifica PHEV vehicles in the United States, DTC P1A29-00 is documented by FCA/NHTSA communication S2008000019 with no-start/no-crank and MIL-on reports, often alongside P1A2A-00. FCA states the condition may be linked to multiple recalls or service actions requiring module updates.

2. Technical explanation

The verified manufacturer communication describes P1A29-00 and P1A2A-00 as Cell Supervisory Circuits DTCs. Its documented repair direction is to update applicable modules with the most current software under recall/service-action campaigns T34, U73, and U94. The supplied evidence does not establish an individual failed component or a universal root cause.

3. What system is affected?

Cell Supervisory Circuits. No further system definition is established by the supplied verified evidence.

4. How serious is this code?

Unknown. The verified communication documents a no-start/no-crank condition and MIL illumination, but does not assign a severity level.

5. Symptoms you may notice

  • MIL illuminated.
  • No start.
  • No crank.
  • P1A29-00 may be present with P1A2A-00.

6. Possible causes

  • For 2017–2018 PHEV vehicles, FCA states the condition may be linked to multiple recalls or service actions requiring multiple module updates.
  • A specific component-level cause is not yet established by verified 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 diagnosis by an authorized Chrysler/FCA service facility.
  • Provide the technician with DTC P1A29-00 and any accompanying P1A2A-00 code.
  • Ask the dealer to check VIN applicability and completion status for recall/service-action module updates, including T34, U73, and U94.
  • Do not attempt high-voltage system diagnosis or repair yourself.

10. Step-by-step troubleshooting

  1. Verify stored DTCs, including whether P1A2A-00 is also present.
  2. Check the vehicle VIN for applicability and completion of the module-update actions identified by FCA.
  3. Have applicable modules updated with the most current software as directed by FCA service information.

11. When to contact service

Contact an authorized Chrysler/FCA dealer or qualified service facility, particularly if the vehicle will not start or crank and the MIL is on.

12. What the service center may check

  • Confirm the vehicle is a 2017–2018 Chrysler Pacifica PHEV in the United States.
  • Confirm DTC P1A29-00 and check for P1A2A-00.
  • Review VIN-specific eligibility and completion status for T34, U73, and U94.
  • Perform applicable module software updates using current FCA procedures.

13. Possible repair or resolution

  • FCA’s documented resolution is installation of the most current applicable module software through the listed recall/service actions.
  • Whether updates resolve a particular vehicle is not yet established by the supplied verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • FCA US LLC case number S2008000019, release date March 6, 2020: “No Start, No Crank, MIL Lamp ON, DTC’s P1A2A-00, P1A29-00 Cell Supervisory Circuits.”
  • NHTSA manufacturer communication: MC-10175062-9999. https://static.nhtsa.gov/odi/tsbs/2020/MC-10175062-9999.pdf

16. Recall information

  • The manufacturer communication directs applicable module updates under recall/service actions T34, U73, and U94.
  • The supplied evidence does not establish recall descriptions, VIN eligibility, remedy completion status, or whether any one campaign applies to every affected vehicle.

17. Official manufacturer information

Official NHTSA-hosted FCA manufacturer communication S2008000019, published March 6, 2020: https://static.nhtsa.gov/odi/tsbs/2020/MC-10175062-9999.pdf

19. Frequently asked questions

What does P1A29-00 mean for this vehicle?

The verified FCA communication identifies P1A29-00 as a Cell Supervisory Circuits DTC and documents it with no-start/no-crank and MIL-on reports. Further code-definition detail is not established by the supplied evidence.

Which vehicles are covered by the supplied evidence?

2017–2018 Chrysler Pacifica PHEV vehicles in the United States.

Can P1A29-00 occur with another code?

Yes. FCA’s communication specifically documents P1A29-00 together with P1A2A-00.

What is the documented repair direction?

FCA directs technicians to apply the most current applicable module updates listed under T34, U73, and U94.

Is it safe to drive or charge?

Not yet established by verified evidence.

20. Sources & verification

Verified
Chrysler P1A29-00: Owner complaint no start Mil lamp on. Technician… | EV Diagnostics