Jeep P04EE
Fuel Tank Side as stored or active. Discussion: Verify the vehicle has no applicable Technical Service Bulletins (TSB’s) or other related field service actions. Inspect the fuel fi
Quick answer
For the verified application, P04EE means “Evaporative System Very Small Leak Detected – Fuel Tank Side.” Official Jeep service communication S2208000150 addresses this code with a MIL and possible “Check Fuel Cap” message.
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1. What does P04EE mean?
For the verified application, P04EE means “Evaporative System Very Small Leak Detected – Fuel Tank Side.” Official Jeep service communication S2208000150 addresses this code with a MIL and possible “Check Fuel Cap” message.
2. Technical explanation
Verified evidence identifies P04EE as an evaporative-system very small leak detected on the fuel-tank side. The official communication specifically concerns PHEV vehicles and instructs technicians to first verify whether applicable TSBs or other field service actions apply, then inspect the fuel filler cap. It notes that PHEV vehicles have a grey fuel-fill cap labeled “PHEV.”
3. What system is affected?
Fuel-tank-side evaporative emissions system. The provided evidence also identifies the Powertrain Control Module (PCM) in the related-code description.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- Malfunction Indicator Lamp (MIL) illuminated.
- “Check Fuel Cap” message.
- The condition may be reported after recent vehicle service.
6. Possible causes
- The official communication directs inspection of the fuel filler cap. A specific failed component or root 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
- Confirm the installed fuel filler cap is the grey cap labeled “PHEV,” as identified in the official communication.
- Arrange diagnosis by an authorized Jeep service center if the MIL or “Check Fuel Cap” message is present.
- Do not attempt high-voltage-system repairs.
10. Step-by-step troubleshooting
- Have a technician check for applicable Technical Service Bulletins or other related field service actions.
- Have the technician inspect the fuel filler cap, following the official Jeep procedure.
- Not yet established by verified evidence: further diagnostic steps or component tests.
11. When to contact service
Contact an authorized Jeep service center for diagnosis, particularly if P04EE is stored or active with a MIL or “Check Fuel Cap” message.
12. What the service center may check
- Check for applicable TSBs and other related field service actions.
- Inspect the fuel filler cap.
- Confirm the PHEV fuel filler cap is grey and labeled “PHEV.”
13. Possible repair or resolution
- The provided evidence does not establish a specific repair or final resolution. Follow the applicable official Jeep service procedure after inspection and bulletin review.
14. Affected vehicles
- Jeep Wrangler · 2021–2022 · US
15. Related TSBs / service bulletins
- Jeep service communication S2208000150, published August 19, 2022, addresses MIL illumination and a “Check Fuel Cap” message with P04EE and/or P04EC.
- NHTSA manufacturer communication records: MC-10225351-9999, MC-10229494-9999, and MC-10225214-9999.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Verified official source: NHTSA-hosted Jeep manufacturer communication S2208000150 (published 2022-08-19): https://static.nhtsa.gov/odi/tsbs/2022/MC-10225351-9999.pdf
19. Frequently asked questions
What does P04EE mean?
For the verified Jeep application, it means “Evaporative System Very Small Leak Detected – Fuel Tank Side.”
What warning signs are documented?
The official communication documents an illuminated MIL and a possible “Check Fuel Cap” message.
Which vehicles are verified as applicable?
Jeep Wrangler model years 2021–2022 in the United States. The communication evidence refers to PHEV vehicles.
Is a recall associated with P04EE?
Not yet established by verified evidence.