Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSLAND ROVER2009LR3 (LA) V8-4.4LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSOXYGEN SENSORSERVICE AND REPAIRCATALYST MONITOR SENSOR LH
2009 Land Rover LR3 (LA) V8-4.4L
Catalyst Monitor Sensor LH
2009 Land Rover LR3 (LA) V8-4.4LSECTION Catalyst Monitor Sensor LH
Special Tools:
Catalyst Monitor Sensor LH
Service Repair No - 19.22.71
Removal
WARNING: Do not work on or under a vehicle supported only by a jack. Always support the vehicle on safety stands.
1. Raise and support the vehicle.
2. Disconnect the LH catalytic converter from the exhaust manifold.
^ Remove and discard the 2 bolts.
3. Disconnect the RH catalytic converter from the exhaust manifold.
^ Remove and discard the 2 bolts.
4. Remove the catalyst monitor sensor electrical connector heat shield.
^ Remove the 2 bolts.
5. Using the special tool, remove the catalyst monitor sensor.
^ Release the wiring harness.
^ Disconnect the electrical connector.
Installation
CAUTION:
^ Make sure the anti-seize compound does not contact the catalyst monitor sensor tip.
^ Make sure the catalyst monitor sensor wiring harness is not twisted more than 180 ° and is not in contact with either the exhaust or driveshaft.
1. Using the special tool, install the catalyst monitor sensor.
^ Clean the components.
^ Apply an anti-seize compound to the thread of the sensor.
^ Tighten the catalyst monitor sensor to 45 Nm (33 ft. lbs.).
^ Connect the electrical connector.
^ Attach the wiring harness.
2. Install the heat shield.
^ Tighten the bolts to 10 Nm (7 ft. lbs.).
3. Position the RH catalytic converter to the exhaust manifold.
^ Clean the components.
^ Tighten the new bolts to 22 Nm (16 ft. lbs.).
CAUTION: Make sure there is a clearance (A) of 25 mm to 30 mm between the closest points of the LH catalytic converter and the front driveshaft.
4. Position the LH catalytic converter to the exhaust manifold.
^ Clean the components.
^ Tighten the new bolts to 22 Nm (16 ft. lbs.).
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.