XJ-S Coupe (XJ27) V12-6.0L (1994)
Fuel Pressure Release: Service and Repair
Fig.1 Heated Oxygen Sensor Relay Location
1. Open hood and remove heated oxygen sensor heater relay (3) from holder, Fig. 1.
2. Start engine and allow to run at idle to relieve fuel system pressure.
3. Switch ignition switch Off, then replace heated oxygen sensor heater relay.