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Honda P0456

slip feeling when tightened. T

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Honda dealer or qualified service provider for diagnosis. The supplied official NHTSA manufacturer communication documents this condition for the applicable vehicle.
Confidence95%

Quick answer

For a 2013 Honda Fit in the US, P0456 is documented in an official Honda service bulletin as an EVAP-system very small leak detected. The bulletin also notes that the fuel fill cap may be loose or may have a stick-slip feeling when tightened.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

Video guides

Watch Videos

Relevant videos play here without leaving this diagnostic page.

DTC P0455, P0456: Fuga en el Sistema EVAP Detectada - Honda Civic 2022+DIY Honda Garage Español
DTC P0456-00 Fuga Muy Pequeña del Sistema de Emisión Evaporativa – Honda CR-V 2023+DIY Honda Garage Español
DTC P0456: Se detectó una fuga muy pequeña en el sistema de emisiones evaporativas - Honda CR-V 2...DIY Honda Garage Español

Videos are supporting material and never override OEM or regulator evidence.

1. What does P0456 mean?

For a 2013 Honda Fit in the US, P0456 is documented in an official Honda service bulletin as an EVAP-system very small leak detected. The bulletin also notes that the fuel fill cap may be loose or may have a stick-slip feeling when tightened.

2. Technical explanation

The supplied verified NHTSA manufacturer communication states that P0456 means “EVAP system very small leak detected.” It describes a condition in which the MIL may illuminate and P0456, P0455, or both may be stored. The evidence specifically associates the condition with a fuel fill cap that may be loose or have a stick-slip feeling while being tightened.

3. What system is affected?

EVAP (evaporative-emissions) system, with the verified bulletin specifically noting the fuel fill cap.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • MIL/check-engine light may come on.
  • DTC P0456 may be set.
  • DTC P0455 may also be set.
  • The fuel fill cap may be loose.
  • The fuel fill cap may have a stick-slip feeling when tightened.

6. Possible causes

  • The verified bulletin identifies a fuel fill cap that may be loose or have a stick-slip feeling when tightened in connection with this condition.
  • Any further 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

  • Do not attempt high-voltage repairs; no high-voltage repair procedure is supported by the supplied evidence.
  • If the MIL is illuminated or the fuel fill cap feels loose or stick-slips when tightened, arrange diagnosis by a Honda dealer or qualified service provider.
  • Provide the stored code P0456 and the cap symptom, if present, when requesting service.

10. Step-by-step troubleshooting

  1. Verify whether the MIL is on and whether P0456 and/or P0455 is stored using appropriate diagnostic equipment.
  2. Note whether the fuel fill cap is loose or has a stick-slip feeling during tightening.
  3. Further diagnostic steps are not provided by the supplied verified evidence.

11. When to contact service

Contact a Honda dealer or qualified service provider for diagnosis. The supplied official NHTSA manufacturer communication documents this condition for the applicable vehicle.

12. What the service center may check

  • Check for P0456 and/or P0455.
  • Assess whether the fuel fill cap is loose or has a stick-slip feeling when tightened.
  • Additional service checks are not yet established by verified evidence.

13. Possible repair or resolution

  • A specific repair or resolution is not included in the supplied verified evidence.
  • Diagnosis and repair should follow the applicable Honda service information.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA Manufacturer Communication 10129552, published February 18, 2014: Service bulletin describing MIL illumination with P0455 and/or P0456 and a fuel fill cap that may be loose or have a stick-slip feeling when tightened. The supplied applicability is 2013 Honda Fit, US.

16. Recall information

  • No recall information was supplied or verified.

17. Official manufacturer information

Verified source: NHTSA Manufacturer Communication 10129552, Service Bulletin, published 2014-02-18. https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2015-2019.zip#nhtsa_id=10129552

19. Frequently asked questions

What does P0456 mean for the applicable 2013 Honda Fit?

The verified Honda bulletin describes P0456 as “EVAP system very small leak detected.”

Can P0456 occur with P0455?

Yes. The verified bulletin states that P0455 and/or P0456 may be set.

What fuel-cap symptom is documented?

The fuel fill cap may be loose or may have a stick-slip feeling when tightened.

Is it safe to drive or charge with P0456?

Not yet established by verified evidence.

20. Sources & verification

ReferenceVerified
Honda P0456: slip feeling when tightened. T | EV Diagnostics