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Chrysler P00FD

P00FD reoccur, use the below DTC set list to further test and resolve. Possible cause list to review for DTC’s that may return. Possible Causes OPEN FUSE IN BATTERY JUMP POST TERMI

DriveNot yet established by verified evidence.
ChargeCharging is addressed by the official communication: do not blind charge. For in-vehicle charging, charge through the IBS or connect the charger's negative clamp to body/engine ground rather than directly to the battery negative post.
ServiceService is appropriate if P00FD recurs after the batteries have been properly charged or if battery/cable connections require inspection. A service tool is required to clear a latched P00FD according to the cited communication.
Confidence95%

Quick answer

For the Chrysler Pacifica applications listed, P00FD is an ECM diagnostic related to the auxiliary battery. It sets when the ECM detects a voltage difference between the auxiliary and main batteries above its allowed limit. The fault can remain latched after voltages return to an acceptable level until cleared with a service tool.

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 P00FD mean?

For the Chrysler Pacifica applications listed, P00FD is an ECM diagnostic related to the auxiliary battery. It sets when the ECM detects a voltage difference between the auxiliary and main batteries above its allowed limit. The fault can remain latched after voltages return to an acceptable level until cleared with a service tool.

2. Technical explanation

Official Chrysler communications state that P00FD concerns ECM monitoring of the auxiliary battery and the voltage delta between the auxiliary and main batteries. P00FD is not related to the Intelligent Battery Sensor (IBS); the communication specifically says not to replace the IBS for P00FD. Recent limited driving or a jump-start may set P00FD. Battery state of charge should be greater than 65% for ESS operation, and the batteries should be properly charged before further testing.

3. What system is affected?

12-volt main and auxiliary battery/ECM monitoring system; ESS-related battery operation.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • A stored P00FD diagnostic trouble code.
  • The code may remain present after the battery-voltage difference returns to an acceptable level because the ECM latches the fault until it is cleared with a service tool.

6. Possible causes

  • Auxiliary-to-main battery voltage difference above the ECM's allowed limit.
  • Recent limited driving.
  • A recent jump-start.
  • An open fuse in the battery jump-post terminal.
  • PCR control-relay output circuit shorted to voltage.
  • Poor connection at vehicle battery positive or negative cable ends.
  • High resistance in the vehicle battery positive circuit, as referenced in the supplied official communication excerpt.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Charging is addressed by the official communication: do not blind charge. For in-vehicle charging, charge through the IBS or connect the charger's negative clamp to body/engine ground rather than directly to the battery negative post.

9. What you can safely do

  • Arrange for proper battery state-of-charge assessment before further diagnosis; the cited communication identifies more than 65% SOC as the ESS target.
  • Have main and auxiliary battery connections checked for loose or corroded connections.
  • Use the vehicle's approved charging connection approach described in the official communication; avoid blind charging.
  • Have a service facility clear the latched DTC with a service tool after appropriate diagnosis and charging.

10. Step-by-step troubleshooting

  1. Verify main and auxiliary battery condition/state of charge using Chrysler service diagnostic battery-charging tables.
  2. Inspect main and auxiliary battery connections for looseness or corrosion.
  3. If P00FD returns, use the DTC set list and further diagnostics referenced by Chrysler to investigate the listed circuit, fuse, cable-end, and resistance possibilities.
  4. Do not use P00FD alone as a reason to replace the IBS.

11. When to contact service

Service is appropriate if P00FD recurs after the batteries have been properly charged or if battery/cable connections require inspection. A service tool is required to clear a latched P00FD according to the cited communication.

12. What the service center may check

  • Measure and document battery readings and state of charge.
  • Confirm battery SOC is above the cited 65% ESS target before further testing.
  • Inspect all main and auxiliary battery connections for loose or corroded connections.
  • Check the battery jump-post terminal fuse.
  • Diagnose the PCR control-relay output circuit for a short to voltage.
  • Inspect battery positive and negative cable ends and evaluate the referenced positive-circuit high-resistance condition.
  • Clear the ECM-latched DTC with a service tool after diagnosis.

13. Possible repair or resolution

  • Properly charge the batteries before additional testing when low charge is identified.
  • Correct verified connection, fuse, relay-output-circuit, or cable-resistance faults found during diagnostic testing.
  • Do not replace the IBS for P00FD based on the cited Chrysler communication.
  • Clear the latched code with a service tool once the underlying condition has been addressed.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA manufacturer communication S1408000384, published February 14, 2023: P00FD relates to ECM auxiliary-battery diagnostics, may latch until cleared with a service tool, is not an IBS fault, and includes charging-connection guidance. https://static.nhtsa.gov/odi/tsbs/2023/MC-10234420-9999.pdf
  • NHTSA manufacturer communication S2008000075RevA, published July 13, 2022: addresses P00FD following limited driving or jump-starting, battery SOC above 65% for ESS, and inspection of main/AUX battery connections. https://static.nhtsa.gov/odi/tsbs/2022/MC-10223766-9999.pdf
  • NHTSA manufacturer communication S2008000075, published June 25, 2020: addresses battery charging before further testing and lists possible causes for recurring P00FD. https://static.nhtsa.gov/odi/tsbs/2020/MC-10177501-9999.pdf

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified applicability supplied: Chrysler Pacifica, US market, model years 2017–2023. The supplied records include overlapping year ranges; exact bulletin applicability by individual VIN is not established by the supplied evidence.

19. Frequently asked questions

What does P00FD mean on a Chrysler Pacifica?

The supplied official communication says the ECM sets P00FD when it detects a voltage delta between the auxiliary and main batteries above the allowed limit.

Will P00FD clear itself after the batteries recover?

Not necessarily. The official communication says the ECM latches this fault even after the voltage delta returns to an acceptable level unless it is cleared with a service tool.

Is P00FD an IBS fault?

No. The official communication states that P00FD is not related to the IBS and says never to replace the IBS for P00FD.

Can limited driving or a jump-start contribute to P00FD?

Yes. The supplied Chrysler communications state that recent limited driving or a jump-start may set P00FD.

What battery charge level is referenced for ESS operation?

The cited Chrysler communication identifies a target battery state of charge greater than 65% for ESS operation.

20. Sources & verification

ReferenceVerified
Chrysler P00FD: P00FD reoccur, use the below DTC set list to further… | EV Diagnostics