TSB: Jaguar Poor Heat Performance

This bulletin applies to 2024 Jaguar E-PACE and F-PACE vehicles. JLR Engineering have received reports of poor passenger compartment heating performance and/or slow to warm up; and EV mode being unavailable with DTC B1DC5-64 stored in the HVAC module.

The cause of the DTC can include no or low flow of coolant, air in the cooling system, auxiliary passenger compartment coolant pump issue and/or coolant hose incorrectly installed or faulty.

Do not renew the HVCH (high voltage coolant heater) if this DTC is stored. This indicates that the HVCH has had an overheat prevention event and will not operate for that drive cycle. If DTC B1DC5-93 is also stored and cannot be erased, then the HVCH should be renewed.