DTC P20E9-85: Reductant Pressure Too High - Signal above allowable range: Action

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

NOTE: A fault clear is NOT sufficient to clear the vehicle 'inducement' system warnings. The 'inducement' warnings automatically clear ONLY upon confirmation of the repair by the vehicle OBD system. The monitoring MUST be executed. The pressure build-up normally occurs once the selective catalyst reduction catalytic converter temperature exceeds 150 °C

Prioritised Checks to Perform
- Check diesel exhaust fluid line for blockage
- Check diesel exhaust fluid injector for blockage
- Check diesel exhaust fluid tank module for blockage
- Check diesel exhaust fluid line is not frozen
- Check diesel exhaust fluid injector is not frozen
- Check diesel exhaust fluid tank module is not frozen
Vehicle Conditions to enable DTC Logging Strategy
- DEF system pressurized
- On completion of the previous repair actions the following MUST be carried out
- Using the Jaguar Land Rover Approved Diagnostic Equipment, clear the DTCs and retest
- NOTE: The engine MIL is OFF (when engine ON)
- Drive vehicle at urban speeds approximately 50mph
- NOTE: These conditions ensure that the selective catalyst reduction catalytic converter temperature exceeds 150 °C at which the system pressure build up is initiated
- The monitoring is executed within 15 minutes of the driving cycle
- The 'inducement' warning clears automatically once the monitoring has executed. This terminates the drive cycle
- NOTE: If the engine MIL shows during the driving cycle: the malfunction has re-occurred
- Using the manufacturer approved diagnostic system clear all stored DTCs using the 'Diagnosis Menu' tab
- NOTE: This clears the fault storage from P2BAE/P2BAF