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Hyundai P1441

Purge Condition) a. Misdiagnosis due to insufficient margin of pressure deviation when driving at constant speed with low engine load i. Logic improvement to eliminate misdiagnosis

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Hyundai dealer or qualified Hyundai service provider to determine whether bulletin 23-EE-002H applies to the vehicle.
Confidence95%

Quick answer

For the 2023 Hyundai Tucson Hybrid and Plug-in Hybrid in the U.S., P1441 is covered by Hyundai bulletin 23-EE-002H as an EVAP-system-flow-during-non-purge-condition misdiagnosis that can occur during constant-speed, low-engine-load driving. The bulletin describes an ECM/HCU software logic improvement intended to eliminate the misdiagnosis.

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 P1441 mean?

For the 2023 Hyundai Tucson Hybrid and Plug-in Hybrid in the U.S., P1441 is covered by Hyundai bulletin 23-EE-002H as an EVAP-system-flow-during-non-purge-condition misdiagnosis that can occur during constant-speed, low-engine-load driving. The bulletin describes an ECM/HCU software logic improvement intended to eliminate the misdiagnosis.

2. Technical explanation

Verified evidence identifies P1441 in this application as “EVAP System Flow During Non-Purge Condition.” Hyundai’s bulletin states that insufficient margin of pressure deviation during constant-speed driving with low engine load can lead to a misdiagnosis. The documented remedy direction is an Engine Control Module (ECM) / Hybrid Control Unit (HCU) software update with improved diagnostic logic.

3. What system is affected?

Evaporative-emissions (EVAP) diagnostic logic, with ECM/HCU software involved.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • A P1441 diagnostic trouble code may be stored.
  • The documented condition may occur while driving at constant speed with low engine load.

6. Possible causes

  • For the specified vehicle application, Hyundai documents a possible misdiagnosis caused by insufficient pressure-deviation margin during constant-speed, low-engine-load driving.
  • 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

  • Arrange Hyundai dealer or qualified-service diagnosis and ask them to check applicability of bulletin 23-EE-002H.
  • Provide the stored P1441 code and the driving conditions, if known.
  • Do not attempt ECM, HCU, or high-voltage-system repair yourself.

10. Step-by-step troubleshooting

  1. Verify that the vehicle is a U.S.-specification 2023 Hyundai Tucson Hybrid or Plug-in Hybrid.
  2. Have service personnel confirm the stored DTC and evaluate whether the ECM/HCU software update in Hyundai bulletin 23-EE-002H applies.
  3. No further diagnostic procedure is established by the supplied verified evidence.

11. When to contact service

Contact a Hyundai dealer or qualified Hyundai service provider to determine whether bulletin 23-EE-002H applies to the vehicle.

12. What the service center may check

  • Confirm vehicle applicability: 2023 Hyundai Tucson Hybrid (NX4 HEV) or Plug-in Hybrid (NX4 PHEV), U.S. market.
  • Confirm P1441 is present.
  • Check ECM/HCU software-update applicability under Hyundai bulletin 23-EE-002H.

13. Possible repair or resolution

  • The verified bulletin describes an ECM/HCU software update that improves diagnostic logic to eliminate the documented P1441 misdiagnosis.
  • Whether this update resolves an individual vehicle has not yet been established by the supplied verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Hyundai bulletin 23-EE-002H, published March 13, 2023: ECM/HCU software update for Tucson Hybrid (NX4 HEV) and Tucson Plug-in Hybrid (NX4 PHEV), including P1441 diagnostic-logic improvement.
  • NHTSA manufacturer communication: MC-10233539-0001.pdf.

16. Recall information

  • No recall is established by the supplied verified evidence.

17. Official manufacturer information

Official source: NHTSA-hosted Hyundai manufacturer communication 23-EE-002H: https://static.nhtsa.gov/odi/tsbs/2023/MC-10233539-0001.pdf

19. Frequently asked questions

What does P1441 mean for the covered 2023 Hyundai Tucson Hybrid/PHEV?

Hyundai identifies it as “EVAP System Flow During Non-Purge Condition.”

Is P1441 necessarily an EVAP hardware failure?

Not according to the supplied evidence. Hyundai documents a potential misdiagnosis related to diagnostic pressure-deviation margin and provides a software-logic improvement.

Which vehicles are established as applicable?

U.S.-market 2023 Hyundai Tucson Hybrid and Tucson Plug-in Hybrid vehicles.

Is it safe to drive or charge?

Not yet established by verified evidence.

20. Sources & verification

Verified
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