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Kia P0456

Leak detected) and the evaporative (EVAP) leak self-test resulted in NTF, a manual EVAP test is rec

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService evaluation is appropriate when P0456 is present, particularly when the EVAP leak self-test has resulted in NTF. Kia bulletin PS469 addresses manual EVAP testing for hard-to-find/small leaks.
Confidence95%

Quick answer

For a 2015–2016 Kia Soul in the US, DTC P0456 is identified in Kia bulletin PS469 as an evaporative-emissions-system leak detected code. When the EVAP leak self-test returns NTF, the bulletin recommends a manual EVAP test for hard-to-find/small leaks.

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 P0456 mean?

For a 2015–2016 Kia Soul in the US, DTC P0456 is identified in Kia bulletin PS469 as an evaporative-emissions-system leak detected code. When the EVAP leak self-test returns NTF, the bulletin recommends a manual EVAP test for hard-to-find/small leaks.

2. Technical explanation

Verified evidence identifies P0456 as an EVAP (evaporative emissions) system leak-detected DTC in the cited Kia manufacturer communication. The communication specifically addresses situations where the malfunction indicator lamp (MIL) is illuminated with P0456 and the EVAP leak self-test resulted in NTF. It describes the procedure topic as an evaporative-emissions test for hard-to-find/small leaks and states that a manual EVAP test is recommended in that situation.

3. What system is affected?

Evaporative emissions (EVAP) system.

4. How serious is this code?

Unknown. The supplied verified evidence does not assign a severity level.

5. Symptoms you may notice

  • The malfunction indicator lamp (MIL) may be illuminated.

6. Possible causes

  • An EVAP-system leak is indicated by DTC P0456.
  • The specific leak source or component 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 diagnostic evaluation by a qualified service provider.
  • Provide the stored DTC P0456 and note whether the EVAP leak self-test result was NTF, if that information is available.

10. Step-by-step troubleshooting

  1. Kia bulletin PS469 states that when the MIL is illuminated with P0456 and the EVAP leak self-test resulted in NTF, a manual EVAP test is recommended.
  2. The supplied evidence does not provide further verified diagnostic steps or test specifications.

11. When to contact service

Service evaluation is appropriate when P0456 is present, particularly when the EVAP leak self-test has resulted in NTF. Kia bulletin PS469 addresses manual EVAP testing for hard-to-find/small leaks.

12. What the service center may check

  • Confirm the stored DTC(s).
  • Determine whether the EVAP leak self-test result was NTF.
  • Perform the manual EVAP test referenced by Kia bulletin PS469 when the stated conditions apply.

13. Possible repair or resolution

  • The repair needed depends on the result of the manual EVAP test. A specific repair is not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Kia PS469 / NHTSA Manufacturer Communication 10109813, published January 18, 2017: “EVAPORATIVE EMISSIONS TEST FOR HARD TO FIND/SMALL LEAKS.” It applies to the cited P0456 EVAP leak-detected condition when the EVAP leak self-test resulted in NTF and recommends a manual EVAP test.

16. Recall information

  • No recall information was supplied in the verified evidence.

17. Official manufacturer information

Official source: NHTSA Manufacturer Communication 10109813, Kia PS469, published January 18, 2017. https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2015-2019.zip#nhtsa_id=10109813

19. Frequently asked questions

What does P0456 mean on the verified Kia application?

The supplied Kia communication identifies P0456 as an evaporative emissions system leak-detected DTC.

What Kia vehicle application is supported by the evidence?

The supplied applicability evidence supports US-market 2015–2016 Kia Soul vehicles.

What does Kia recommend if the EVAP leak self-test is NTF?

Kia bulletin PS469 recommends a manual EVAP test for hard-to-find/small leaks when P0456 is present and the EVAP leak self-test resulted in NTF.

Is it safe to drive or charge with P0456?

Not yet established by verified evidence.

20. Sources & verification

ReferenceVerified
Kia P0456: Leak detected) and the evaporative (EVAP) leak self-test… | EV Diagnostics