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Diesel Exhaust Fluid (Def) Level

WARNING: This page is about a different car, the 2018 Jaguar XE and 2017 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.

The level of DEF in the tank is checked via the Instrument Cluster (IC) menu. When selected the message center displays the approximate amount of DEF remaining, providing an estimated km/miles figure remaining, prior to emptying the tank

The DEF tank is fitted with combined temperature/ultrasonic level sensors. Circuit continuity and plausibility of the signals received are checked within the ECM. An ultrasonic "no echo malfunction" is set if no valid echo from the ultrasonic sensor is detected during a predefined time. This typically happens when the ultrasonic signal of the sensor is blocked, or if the DEF tank is overfilled (the air pocket at the top of the DEF tank is no longer present). The vehicle message center display's an advisory/warning system, which activates in low DEF conditions. If no corrective action is made, the engine will eventually not restart. The stages in the warning system are listed in the following tables

NOTE: None of the listed stages will activate the MIL. The stages are automatically cleared if the DEF level is increased
STAGES CAUSE WARNING MESSAGE DESCRIPTION
Stage 1 DEF range <1500mls/2400km Message at engine start Low Diesel Exhaust Fluid
  • The DEF is running low. Fill DEF at the earliest convenience
    • The volumes of DEF are consumption and DEF tank geometry defendant
Stage 2 DEF range <940mls/1500km Amber symbol Refill Diesel Exhaust Fluid
  • The DEF is running low
    • The volumes of DEF are consumption and DEF tank geometry defendant
Stage 3 DEF range <515mls/830km Amber symbol No engine restart possible soon. Diesel Exhaust Fluid
  • The DEF is running low. Fill DEF immediately or engine will not start
    • The volumes of DEF are consumption and DEF tank geometry defendant
Stage 4 DEF range <100mls/160km Amber symbol No engine restart possible soon. Diesel Exhaust Fluid
  • The DEF is running critically low. Fill DEF immediately or engine will not start
    • The volumes of DEF are consumption and DEF tank geometry defendant
Stage 5 DEF range <0mls/0km Red symbol No engine restart possible
  • The DEF tank is empty. Fill DEF to the minimum restart level condition
    • The volumes of DEF are consumption and DEF tank geometry defendant
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