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Jaguar B1DC5

93 is stored in the HVAC Control Module (HVAC). This results in a lack of passenger compartment heating. The functionality of the heated wi

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact an authorized Jaguar retailer or qualified EV service provider, particularly if passenger-compartment heating is unavailable and B1DC5-93 is stored.
Confidence95%

Quick answer

For certain 2019–2023 Jaguar I-PACE vehicles in the US, DTC B1DC5-93 stored in the HVAC Control Module is associated with a High Voltage Coolant Heater (HVCH) unit that may fail, resulting in a lack of passenger-compartment heating.

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 B1DC5 mean?

For certain 2019–2023 Jaguar I-PACE vehicles in the US, DTC B1DC5-93 stored in the HVAC Control Module is associated with a High Voltage Coolant Heater (HVCH) unit that may fail, resulting in a lack of passenger-compartment heating.

2. Technical explanation

NHTSA-posted Jaguar manufacturer communications identify B1DC5-93 as “High Voltage Coolant Heater #1 - No Operation.” Jaguar’s H525 communications state that, on affected I-PACE vehicles, the HVCH unit may fail and B1DC5-93 may be stored in the HVAC Control Module. The stated result is loss of passenger-compartment heating. The supplied evidence does not establish a broader diagnostic procedure or confirm the condition on every vehicle with this code.

3. What system is affected?

HVAC Control Module and High Voltage Coolant Heater (HVCH).

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • Lack of passenger-compartment heating.

6. Possible causes

  • The High Voltage Coolant Heater (HVCH) unit may fail.

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

  • Arrange diagnosis by an authorized Jaguar retailer or suitably qualified EV service provider.
  • Do not attempt high-voltage coolant-heater diagnosis or repair yourself.

10. Step-by-step troubleshooting

  1. Confirm whether B1DC5-93 is stored in the HVAC Control Module.
  2. Have a qualified service provider assess the High Voltage Coolant Heater system. Further diagnostic steps are not established by the supplied verified evidence.

11. When to contact service

Contact an authorized Jaguar retailer or qualified EV service provider, particularly if passenger-compartment heating is unavailable and B1DC5-93 is stored.

12. What the service center may check

  • Check the HVAC Control Module for DTC B1DC5-93.
  • Assess the High Voltage Coolant Heater (HVCH) unit in accordance with applicable Jaguar service information. Specific test steps are not established by the supplied verified evidence.

13. Possible repair or resolution

  • Jaguar manufacturer communications state that the HVCH unit may fail; the supplied evidence does not specify the approved repair or replacement procedure.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Jaguar SSM74178, NHTSA Manufacturer Communication 10153858, published December 10, 2018. It identifies B1DC5-93 as “High Voltage Coolant Heater #1 - No Operation” and notes no cabin heating.
  • Jaguar H525, NHTSA Manufacturer Communication 11013927, published January 15, 2025. It concerns I-PACE vehicles through model year 2023 where the HVCH may fail, B1DC5-93 may be stored in the HVAC Control Module, and passenger-compartment heating may be unavailable.
  • Jaguar H525v3, NHTSA Manufacturer Communication 11022393, published August 19, 2025. It similarly addresses I-PACE vehicles through model year 2023 with possible HVCH failure, B1DC5-93 in the HVAC Control Module, and lack of passenger-compartment heating.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official NHTSA-hosted Jaguar communications: https://static.nhtsa.gov/odi/tsbs/2025/MC-11022393-0001.pdf ; https://static.nhtsa.gov/odi/tsbs/2025/MC-11013927-0001.pdf ; https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2015-2019.zip#nhtsa_id=10153858

19. Frequently asked questions

What does B1DC5-93 mean on a Jaguar I-PACE?

The supplied official Jaguar evidence identifies B1DC5-93 as “High Voltage Coolant Heater #1 - No Operation,” stored in the HVAC Control Module.

What symptom is associated with B1DC5-93?

The verified communications state that it results in a lack of passenger-compartment heating.

What component may be involved?

Jaguar’s H525 communications state that the High Voltage Coolant Heater unit may fail.

Which vehicles are covered by the supplied applicability evidence?

Jaguar I-PACE vehicles for model years 2019–2023 in the US. Exact bulletin applicability and repair eligibility should be confirmed with Jaguar using the vehicle identification number.

Can the vehicle be driven or charged with B1DC5-93?

Not yet established by verified evidence.

20. Sources & verification

Verified
Jaguar B1DC5: 93 is stored in the HVAC Control Module (HVAC). This… | EV Diagnostics