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Jeep C1477

Transfer Case Clutch-Over Temperature. Customers may also comment on the following:

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService need is not explicitly established by the supplied database fields; however, official Jeep manufacturer communications exist for this DTC and associated 4WD messages. Have an authorized Jeep service facility evaluate the vehicle using the applicable communication and diagnostic procedure.
Confidence95%

Quick answer

C1477 is a Jeep transfer-case clutch over-temperature DTC. Verified manufacturer communications associate it with a “Service 4WD” message and, in one bulletin, a “4WD Overheated Temporarily Unavailable” message.

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

Video guides

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DTC Jeep C1477-4B Short ExplanationMaxidot Jeep

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

1. What does C1477 mean?

C1477 is a Jeep transfer-case clutch over-temperature DTC. Verified manufacturer communications associate it with a “Service 4WD” message and, in one bulletin, a “4WD Overheated Temporarily Unavailable” message.

2. Technical explanation

The supplied verified evidence identifies C1477 as “Transfer Case Clutch-Over Temperature.” One official manufacturer communication specifically identifies C1477-98 as “Transfer Case Clutch Component Or System Over Temperature.” Another identifies C1477-4B as “Transfer Case Clutch-Over Temperature.”

3. What system is affected?

Transfer case / four-wheel-drive (4WD) system.

4. How serious is this code?

Unknown. The supplied evidence does not establish a severity rating.

5. Symptoms you may notice

  • “Service 4WD” message illuminated.
  • “4WD Overheated Temporarily Unavailable” message, as described in official manufacturer communication 21-048-24.

6. Possible causes

  • A transfer-case clutch component or system over-temperature condition is indicated by C1477-98.
  • Further root 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

  • Do not attempt high-voltage or drivetrain repair procedures based on this information.
  • Arrange diagnosis using the applicable Jeep service information, particularly if a Service 4WD or 4WD-overheated message is present.

10. Step-by-step troubleshooting

  1. Confirm the stored DTC and its suffix, such as C1477-98 or C1477-4B.
  2. Check for the associated 4WD warning message documented in the manufacturer communication.
  3. Use the applicable official Jeep diagnostic procedure. Additional diagnostic steps are not yet established by the supplied verified evidence.

11. When to contact service

Service need is not explicitly established by the supplied database fields; however, official Jeep manufacturer communications exist for this DTC and associated 4WD messages. Have an authorized Jeep service facility evaluate the vehicle using the applicable communication and diagnostic procedure.

12. What the service center may check

  • Retrieve and confirm C1477, including its suffix where available.
  • Assess the documented Service 4WD or “4WD Overheated Temporarily Unavailable” message.
  • Follow the applicable official Jeep service procedure. Specific inspection or repair checks are not provided in the supplied evidence.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA Manufacturer Communication 11014229, S2503000002, published February 10, 2025: “Service 4WD Message Illuminated. Diagnostic Trouble Code (DTC) C1477-98 Transfer Case Clutch Component Or System Over Temperature, Set.”
  • NHTSA Manufacturer Communication 11006985, 21-048-24, published August 30, 2024: lists C1477-4B “Transfer Case Clutch-Over Temperature” and the customer comment “4WD Overheated Temporarily Unavailable” message.

16. Recall information

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

17. Official manufacturer information

Verified applicability: 2022–2025 Jeep Grand Cherokee (US) and 2024 Jeep Wagoneer (US). Official sources: NHTSA manufacturer communications 11014229 and 11006985.

19. Frequently asked questions

What does Jeep code C1477 mean?

It indicates a transfer-case clutch over-temperature condition. The verified communications describe C1477-98 as a transfer-case clutch component or system over-temperature condition and C1477-4B as transfer-case clutch over temperature.

What warning messages can occur with C1477?

Verified communications associate C1477 with a Service 4WD message and with a “4WD Overheated Temporarily Unavailable” message.

Which vehicles are covered by the supplied applicability evidence?

US-market 2022–2025 Jeep Grand Cherokee and 2024 Jeep Wagoneer.

Is it safe to drive with C1477?

Not yet established by verified evidence.

20. Sources & verification

Verified
Jeep C1477: Transfer Case Clutch-Over Temperature. Customers may also… | EV Diagnostics