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Chrysler U0422-00

The check engine light may be illuminated. Upon scanning the vehicle DTC U0422-00 Implausible Data Received From Body Control Module Is found Active in the HCP (Hybrid Control Proc

Common search variants: U042200 · U0422 00 · U0422_00 · Search ignores case and common separators.

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Chrysler dealer or qualified Chrysler PHEV service provider. Provide DTC U0422-00 and reference FCA case number S2108000041.
Confidence95%

Quick answer

For a verified application of the 2021 Chrysler Pacifica PHEV in the U.S., U0422-00 may be stored active in the Hybrid Control Processor (HCP) and the check-engine light may be illuminated. FCA communication S2108000041 identifies an HVAC-module software level/incorrect HVAC flash as a diagnostic consideration and directs technicians to check the HVAC module software level with WiTech 2.

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 U0422-00 mean?

For a verified application of the 2021 Chrysler Pacifica PHEV in the U.S., U0422-00 may be stored active in the Hybrid Control Processor (HCP) and the check-engine light may be illuminated. FCA communication S2108000041 identifies an HVAC-module software level/incorrect HVAC flash as a diagnostic consideration and directs technicians to check the HVAC module software level with WiTech 2.

2. Technical explanation

U0422-00 is described in the supplied FCA/NHTSA manufacturer communication as “Implausible Data Received From Body Control Module,” active in the HCP (Hybrid Control Processor). The communication specifically discusses PHEV RU vehicles and states that the HVAC module may have been flashed with incorrect software. Earlier revisions state that the HVAC module needs AE-level software; later revisions direct a WiTech 2 check of HVAC module software level and reference a repair guide. The supplied evidence does not establish that this is the only possible cause on every vehicle.

3. What system is affected?

The HCP records the DTC. The FCA communication directs diagnosis toward HVAC module software level and, in an earlier version, references the PIM diagnostic procedure leading to the BCM Communication Diagnostic Procedure.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • The check-engine light may be illuminated.
  • A scan may show active DTC U0422-00 in the HCP.

6. Possible causes

  • For PHEV RU, the HVAC module may have been flashed with incorrect software.
  • The HVAC module software may not be at the specified AE level, according to an earlier revision of S2108000041.
  • Other causes are 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

  • Have the vehicle scanned with the appropriate diagnostic equipment to confirm whether U0422-00 is active in the HCP.
  • Arrange diagnosis by a Chrysler-qualified service facility that can follow FCA communication S2108000041 and use WiTech 2.
  • Do not attempt module programming or high-voltage-system repairs yourself.

10. Step-by-step troubleshooting

  1. Using WiTech 2, check the HVAC module software level as directed in FCA communication S2108000041.
  2. Follow the applicable FCA repair guide/diagnostic procedure. An earlier version directs use of the PIM diagnostic procedure, which leads to the BCM Communication Diagnostic Procedure.
  3. If no solution is found, the communication references submitting a TechCONNECT or eCONTACT ticket.

11. When to contact service

Contact a Chrysler dealer or qualified Chrysler PHEV service provider. Provide DTC U0422-00 and reference FCA case number S2108000041.

12. What the service center may check

  • Confirm U0422-00 is active in the HCP.
  • Check HVAC module software level with WiTech 2.
  • Follow the PIM and BCM communication diagnostic procedure where applicable.
  • Escalate through TechCONNECT or eCONTACT if the prescribed process does not resolve the concern.

13. Possible repair or resolution

  • The verified communication indicates that correction may involve the applicable HVAC module software update/flash procedure after confirmation of software level.
  • The exact repair outcome for an individual vehicle is not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • FCA US LLC case S2108000041, revisions issued February through May 2021: Check Engine Light On; U0422-00 Implausible Data Received From Body Control Module active in the HCP.
  • NHTSA manufacturer communication: MC-10223255-9999 (May 11, 2021): https://static.nhtsa.gov/odi/tsbs/2021/MC-10223255-9999.pdf

16. Recall information

  • No recall information was supplied or established by the verified evidence.

17. Official manufacturer information

Verified source: NHTSA-hosted FCA manufacturer communication S2108000041, May 11, 2021: https://static.nhtsa.gov/odi/tsbs/2021/MC-10223255-9999.pdf

19. Frequently asked questions

What does U0422-00 mean in this verified Chrysler communication?

It is described as “Implausible Data Received From Body Control Module” and is found active in the Hybrid Control Processor.

Which vehicle is verified as applicable?

The supplied applicability evidence identifies the 2021 Chrysler Pacifica in the United States. The communication discusses PHEV RU vehicles.

Can incorrect HVAC software set this code?

The communication states that, for PHEV RU, the HVAC module may have been flashed with incorrect software and directs a WiTech 2 check of HVAC module software level.

Is it safe to drive or charge?

Not yet established by verified evidence.

20. Sources & verification

Verified
Chrysler U0422-00: The check engine light may be illuminated. Upon… | EV Diagnostics