DTC B1D23-85: Overheat Sensor - Signal above allowable range: Action
WARNING: This page is about a different car, the 2018 Land Rover Discovery and 2017 Land Rover Discovery. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
To check the operation of the fuel fired booster heater, perform routine - Auxiliary Heater (AHCM) Activation Test (0x900A). Repeat the routine if excessive smoke is emitted from the fuel fired booster heater exhaust.
- Using the Jaguar Land Rover Approved Diagnostic Equipment, clear the DTCs and retest. If the fault persists, install a new fuel fired booster heater as necessary