Def Quality. 16MY NAS_B - 17MY NAS_B

WARNING: This page is about a different variant/trim than selected.

APPLICATION	APPLICATION
16 MY NAS_B	17 MY NAS_B

INCORRECT DEF QUALITY INSTRUMENT CLUSTER WARNING MESSAGE	DTC(s)	PURPOSE AND CAUSE	ACTION
Amber warning message No Engine Restarts Possible in 250 miles/404 km. Incorrect Diesel Exhaust Fluid Quality Detected MIL OFF Reagent indicator (17MY on) ON	P2BA9-67 and/or P2BA9-92 P2BAF-00 and P2BAE-00 and P2BAE-02 (17MY on)	Incorrect diesel exhaust fluid quality Distance to NO ENGINE RESTART 250 miles/404 km	Refer to the DTC help text and complete the repair actions for DTC(s) P2BA9-67 and/or P2BA9-92
Red warning message No Engine Restarts Possible in 0 miles/0 km. Incorrect Diesel Exhaust Fluid Quality Detected MIL OFF Reagent indicator (17MY on) ON	P2BA9-67 and/or P2BA9-92 P241D-00 and P2BAE-00 and P2BAE-02 (17MY on) and P2BAF-00 and P2BAF-02 (17MY on) and P2BAF-04 (17MY on)	Incorrect diesel exhaust fluid quality Distance to NO ENGINE RESTART 0 miles/0 km	Refer to the DTC help text and complete the repair actions for DTC(s) P2BA9-67 and/or P2BA9-92 Using the Jaguar Land Rover Approved Diagnostic Equipment complete Service Functions - Reset Selective Catalyst Reduction Start Inhibit NOTE: On restart 50 km/31 miles allowed to follow repair procedure

DEF Quality

Prior to the NOx sensor and the monitoring function becoming operational, the sensor must have reached its 'dew point'. This is the point where the moisture content in the exhaust gas has evaporated and can no longer damage the NOx sensor. In normal ambient conditions, this process typically takes around 6 to 10 minutes. If a malfunction is detected during the operation of the NOx sensor, a reversible fault is stored. If a malfunction is detected over two (NAS variants) or three (EU6 variants) consecutive drive cycles, a permanent fault is stored and the MIL is activated

The following monitoring is performed on the NOx sensors

Signal plausibility and correction factor limits
Circuit continuity between the sensor control unit and probe element
Operating temperature reached after a defined heating period

Private CAN Bus - Monitoring

The following components are connected to the ECM through a private CAN bus. The ECM provides a gateway, for communication to the vehicle CAN bus

Heater control unit
NOx sensor control unit(s)

The following CAN communication monitoring applies to these components

Signal time-out
Signal check sum

The DEF injector, DEF pump, temperature and level sensors are hardwired to the ECM and do not involve CAN communication