Jeep U0415
If multiple LOC DTCs are present: a. Check battery health, system voltage, and TCM (including valve body). b. If TCM goes offline
Quick answer
For Jeep Grand Cherokee and Wagoneer vehicles in the supplied U.S. 2024–2026 applicability data, U0415 is listed in an official manufacturer communication as a relevant code when diagnosing loss-of-communication (LOC) DTCs. If multiple LOC DTCs are present, the communication directs technicians to check battery health, system voltage, and the transmission control module (TCM), including the valve body. If the TCM goes offline, further diagnosis is indicated by the communication excerpt.
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1. What does U0415 mean?
For Jeep Grand Cherokee and Wagoneer vehicles in the supplied U.S. 2024–2026 applicability data, U0415 is listed in an official manufacturer communication as a relevant code when diagnosing loss-of-communication (LOC) DTCs. If multiple LOC DTCs are present, the communication directs technicians to check battery health, system voltage, and the transmission control module (TCM), including the valve body. If the TCM goes offline, further diagnosis is indicated by the communication excerpt.
2. Technical explanation
The verified evidence does not provide a standalone generic definition of U0415. It identifies U0415 as one of several relevant DTCs in a diagnostic process for multiple LOC DTCs. The supplied manufacturer communication also states that the ESM is not the cause because it is not a gateway module. The excerpt specifically instructs checking battery health, system voltage, and the TCM, including the valve body, when multiple LOC DTCs are present.
3. What system is affected?
Communication-network diagnosis involving multiple LOC DTCs; the verified procedure specifically references the TCM, including the valve body, plus battery health and system voltage.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- Not yet established by verified evidence.
6. Possible causes
- Multiple LOC DTCs may warrant checking battery health, system voltage, and the TCM, including the valve body.
- The supplied official communication states that the ESM is not the cause because it is not a gateway module.
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
- Have the vehicle evaluated by a qualified Jeep service technician using the applicable manufacturer diagnostic procedure.
- Record all stored DTCs, particularly if multiple LOC DTCs are present.
10. Step-by-step troubleshooting
- Read all DTCs.
- When multiple LOC DTCs are present, check battery health.
- Check system voltage.
- Check the TCM, including the valve body.
- If the TCM goes offline, continue diagnosis according to the applicable manufacturer procedure.
11. When to contact service
Service evaluation is appropriate because the verified diagnostic procedure calls for checks of system voltage and the TCM, including the valve body. No verified evidence establishes urgency, drivability, or charging restrictions.
12. What the service center may check
- Read DTCs, including the relevant-code list in the manufacturer communication: U0101, U0140, U0155, U0129, U11C3, U0402, U0422, U0423, U0415, and U145D.
- Check battery health when multiple LOC DTCs are present.
- Check system voltage when multiple LOC DTCs are present.
- Inspect and diagnose the TCM, including the valve body, when multiple LOC DTCs are present.
- Determine whether the TCM goes offline.
13. Possible repair or resolution
- Not yet established by verified evidence. The supplied excerpt provides diagnostic checks but does not specify a repair outcome or replacement procedure.
14. Affected vehicles
- Jeep Grand Cherokee · 2024–2026 · US
- Jeep Wagoneer · 2024–2026 · US
15. Related TSBs / service bulletins
- NHTSA Manufacturer Communication 11021842: 9100641, published August 5, 2025. The supplied excerpt lists U0415 as a relevant DTC and directs checks of battery health, system voltage, and the TCM including the valve body if multiple LOC DTCs are present.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Official source: NHTSA Manufacturer Communication 11021842: 9100641 (official TSB/manufacturer communication), published 2025-08-05. https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2025-2026.zip#nhtsa_id=11021842
- NHTSA: NHTSA Manufacturer Communication 11021842: 9100641 · official_tsb
19. Frequently asked questions
What does U0415 mean for the listed Jeep vehicles?
The verified manufacturer communication lists U0415 as a relevant code in diagnosis of multiple LOC DTCs. A standalone meaning beyond that context is not established by the supplied evidence.
What should be checked if U0415 appears with multiple LOC codes?
The official communication directs checks of battery health, system voltage, and the TCM, including the valve body.
Is the ESM the cause of this issue?
The supplied manufacturer communication states that the ESM is not the cause because it is not a gateway module.
Which vehicles are covered by the supplied applicability data?
Jeep Grand Cherokee and Jeep Wagoneer, model years 2024 through 2026, U.S. region.