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Jeep B273C-00

The cluster may display the “Service Hybrid Electric Vehicle System” message. Upon scanning for DTC’s you may find U0287-00 – Lost Communication With Transmission Fluid Pump Set In

Common search variants: B273C00 · B273C 00 · B273C_00 · Search ignores case and common separators.

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Jeep dealer or qualified hybrid-electric-vehicle service provider for diagnosis. The verified communication does not establish whether repair is covered by warranty.
Confidence95%

Quick answer

For certain 2021–2022 Jeep Wrangler vehicles in the US, B273C-00 may appear with U0287-00 and a “Service Hybrid Electric Vehicle System” message. Verified evidence identifies possible damage to the PIM-to-P2 high-voltage wiring harness, or inductive electrical noise transferred from that damaged harness to a low-voltage harness.

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 B273C-00 mean?

For certain 2021–2022 Jeep Wrangler vehicles in the US, B273C-00 may appear with U0287-00 and a “Service Hybrid Electric Vehicle System” message. Verified evidence identifies possible damage to the PIM-to-P2 high-voltage wiring harness, or inductive electrical noise transferred from that damaged harness to a low-voltage harness.

2. Technical explanation

The verified manufacturer communication describes B273C-00 as “Digital Crash Input” in the HCP (Hybrid Control Processor). It may be found along with U0287-00, “Lost Communication With Transmission Fluid Pump Set,” in the TCM (Transmission Control Module). The communication states that damage to the PIM-to-P2 high-voltage wiring harness may cause these codes, including by transferring inductive noise to a low-voltage harness. It also states that electrical noise may be detectable on circuit R414 with an oscilloscope.

3. What system is affected?

Hybrid electric vehicle system; HCP, TCM, PIM-to-P2 high-voltage wiring harness, and related low-voltage wiring.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • The instrument-panel cluster may display “Service Hybrid Electric Vehicle System.”
  • The vehicle may shake during a cold start.
  • Noise may be heard near the P2 motor.
  • B273C-00 may be stored in the HCP.
  • U0287-00 may be stored in the TCM.

6. Possible causes

  • Damage to the PIM-to-P2 high-voltage wiring harness.
  • Inductive noise from a damaged high-voltage harness being transferred to a low-voltage harness.

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 scanned for stored diagnostic trouble codes.
  • Arrange diagnosis by a qualified Jeep service facility or technician trained to work on hybrid/high-voltage systems.
  • Do not attempt high-voltage wiring inspection or repair yourself.

10. Step-by-step troubleshooting

  1. Confirm whether B273C-00 is stored in the HCP and whether U0287-00 is stored in the TCM.
  2. A qualified technician may evaluate the PIM-to-P2 high-voltage wiring harness for damage.
  3. The manufacturer communication states that electrical noise may be detectable on circuit R414 using an oscilloscope.

11. When to contact service

Contact a Jeep dealer or qualified hybrid-electric-vehicle service provider for diagnosis. The verified communication does not establish whether repair is covered by warranty.

12. What the service center may check

  • Scan the HCP and TCM for B273C-00 and U0287-00.
  • Inspect the PIM-to-P2 high-voltage wiring harness for damage using appropriate high-voltage safety procedures.
  • If applicable, monitor circuit R414 for electrical noise with an oscilloscope.

13. Possible repair or resolution

  • Not yet established by verified evidence. The supplied manufacturer communication identifies diagnostic findings and possible harness-related causes, but does not provide a verified repair resolution.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA Manufacturer Communication PDF 10225982, S2208000154, published September 7, 2022. It addresses a cluster system message, cold-start shaking, noise near the P2 motor, and DTCs U0287-00 and B273C-00. The communication states that it does not authorize warranty repair.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified source: NHTSA Manufacturer Communication PDF 10225982: S2208000154 (Jeep), https://static.nhtsa.gov/odi/tsbs/2022/MC-10225982-9999.pdf. Verified applicability: 2021–2022 Jeep Wrangler vehicles in the United States.

19. Frequently asked questions

What does B273C-00 mean for the affected Jeep Wrangler?

The verified communication identifies B273C-00 as “Digital Crash Input” in the HCP. It may occur with U0287-00 and a “Service Hybrid Electric Vehicle System” message.

Can a damaged harness cause B273C-00 and U0287-00?

Yes. The manufacturer communication states that damage to the PIM-to-P2 high-voltage wiring harness may cause the condition, including through inductive noise transferred to a low-voltage harness.

Is this information applicable to every Jeep vehicle?

No. The verified applicability supplied here is limited to 2021–2022 Jeep Wrangler vehicles in the US.

Is it safe to drive or charge with B273C-00?

Not yet established by verified evidence.

20. Sources & verification

Verified
Jeep B273C-00: The cluster may display the “Service Hybrid Electric… | EV Diagnostics