Engine & fuel system
3 documented faults — symptoms, causes and workshop fixes.
Engine misfire
Cause
Ignition coil low tension lead trapped between rocker cover and cylinder head.
Repair
- Ensure low tension lead is clear of rocker cover to cylinder head joint.
Data: Motorwise Workshop. Bulletin 1.
Poor throttle response
Cause
Accelerator cable adjuster lost or slipping.
Repair
- Fit modified accelerator cable assembly.
Parts4 parts
| Part | Part number | Qty |
|---|---|---|
| Cable - Range Rover RHD | SSB104040 | 1 |
| Cable - Range Rover LHD | SSB104050 | 1 |
| Cable - Discovery RHD | SSB104300 | 1 |
| Cable - Discovery LHD | ANR5327 | 1 |
Data: Motorwise Workshop. Bulletin 4.
Difficult to add fuel to tank due to spit back or delivery cut-off
Cause
Variations in forecourt pump delivery rates.
Repair
- Fit modified fuel filler neck.
Parts3 parts
| Part | Part number | Qty |
|---|---|---|
| Fuel filler neck - unleaded | WMJ100180 | 1 |
| Fuel filler neck - leaded | WMJ100190 | 1 |
| Fuel filler neck - diesel | WMJ100140 | 1 |
Data: Motorwise Workshop. Bulletin 5.
Electrical & ignition
3 documented faults — symptoms, causes and workshop fixes.
Water/dirt ingress into crash sensor harness multi-plugs
Overview
Cause
When the SRS sensor wiring connector disconnected water/dirt seal may become dislodged or lost.
Repair
- Ensure seal is fitted in the wiring harness multi-plug.
- Ensure pointsare aligned.
Data: Motorwise Workshop. Bulletin 6.
Alarm/immobilizer will not disarm when using remote control
Cause
Loss of communication between key remote control and control module.
Repair
- Re-synchronize key remote controls.
Data: Motorwise Workshop. Bulletin 11.
Battery discharged
Cause
Multifunction control module does not switch to sleep mode after alarm set.
Repair
- Check multifunction control module and replace as necessary.
Data: Motorwise Workshop. Bulletin 12.
Suspension & drivetrain
1 documented fault — symptoms, causes and workshop fixes.
Active height control suspension does not operate or rises slowly
Overview
- Affects
- All models.
Cause
Faulty suspension adjustment main valve block.
Faulty suspension compressor pump.
Repair
- Inspect suspension adjustment main valve block. Repair/replace component as necessary.
- Replace suspension compressor pump if necessary.
Data: Motorwise Workshop. Bulletin 9.
Clutch & gearbox
2 documented faults — symptoms, causes and workshop fixes.
Message centre displays 'Gearbox Overheat' after heavy towing or short sand driving
Cause
Transmission fluid temperature sensor.
Repair
- Fit modified transmission fluid temperature sensor.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Transmission fluid temperature sensor | ESR 4329 | 1 |
Data: Motorwise Workshop. Bulletin 2.
Poor performance or failure of AC system
Overview
- Affects
- All models.
Cause
Outside air temperature sensor faulty.
AC refrigerant pressure switch faulty.
AC compressor clutch sticking intermittently.
Repair steps
- Check outside air temperature sensor and replace as necessary.
- Check AC refrigerant pressure switch and replace as necessary.
- Check AC compressor clutch and replace as necessary.
Data: Motorwise Workshop. Bulletin 14.
Air conditioning & heating
3 documented faults — symptoms, causes and workshop fixes.
In-car temperature too hot in cold conditions and too cold in hot conditions
Cause
In-car temperature sensor blower is sluggish or seized.
Repair
- Fit new in-car temperature sensor (blower incorporated).
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| In-car temperature sensor | JTF000030 | 1 |
Data: Motorwise Workshop. Bulletin 3.
Unable to select temperature settings
Overview
- Affects
- All models.
Symptoms
Unable to select air direction settings.
Cause
AC control module fault.
AC/heater air mix flap motor(s) faulty.
Repair
- Check AC control module and replace as necessary.
- Check AC/heater air mix flap motor(s) and replace as necessary.
Data: Motorwise Workshop. Bulletin 13.
Coolant loss
Overview
- Affects
- All models with petrol engines.
Symptoms
Engine overheating.
Cause
Repair steps
- Pressure test cooling system.
- Check for leaks.
- Replace cylinder head gasket as necessary.
- Replace inlet manifold gasket as necessary.
- Replace heater matrix seals as necessary.
Data: Motorwise Workshop. Bulletin 15.
Wipers & visibility
1 documented fault — symptoms, causes and workshop fixes.
Wind noise from windscreen area whilst driving at high speed
Cause
Distortion of windscreen trim.
Repair
- Replace trim at top of windscreen.
Data: Motorwise Workshop. Bulletin 10.
Other
2 documented faults — symptoms, causes and workshop fixes.
Alloy wheels difficult to remove
Overview
- Affects
- All models with alloy wheels, →03/01.
- Remedy
- Clean & lubricate
- Parts
- 1 part
Cause
Corrosion between hub spigot and wheel centre.
Repair
- Clean corrosion from wheel contact surfaces.
- Apply anti-seize grease to wheel contact surfaces.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Anti-seize grease | RYL105020L | 1 |
Data: Motorwise Workshop. Bulletin 7.
Water ingress into front footwells
Cause
AC evaporator drain tubes blocked.
Repair
- Check AC evaporator drain tubes for blockage, clean as necessary.
Data: Motorwise Workshop. Bulletin 8.
Glossary
Technical terms used in this guide.
- VIN
- Vehicle identification number — 17 characters, found at the base of the windscreen and on the V5C logbook
- AC
- Air conditioning — the system that cools the cabin
- LH
- Left-hand — the left side of the vehicle as you sit in it
- SRS
- Supplementary restraint system — the airbags and seat-belt pretensioners
- AC/Heater
- The heating and air-conditioning system
- Anti-Seize
- Grease that stops mating parts (like a wheel on a hub) from corroding together
- Compressor Pump
- The pump that pressurises the air-suspension system
- Control Module
- A control unit for one of the vehicle's systems (engine, gearbox, brakes, body, and so on)
- Heater Matrix
- The small radiator behind the dashboard that provides cabin heat
- Hub Spigot
- The raised centre of the hub that locates the wheel
- In-Car Temperature
- The cabin-temperature sensor used by the climate control
- Inlet Manifold
- The housing that distributes air into the cylinders
- Multi-Plug
- A multi-pin electrical connector on a wiring harness
- Multifunction Control Module
- The control module that runs shared electrical functions (lights, wipers, locking, and so on)
- Refrigerant
- The gas/liquid that carries heat in the air-conditioning system
- Valve Block
- The set of solenoid valves that directs air or fluid in the air-suspension or gearbox
- Wiring Harness
- The bundled cables that carry power and signals around the vehicle
- Evaporator
- The air-conditioning heat exchanger in the dashboard that cools the cabin air
- Head Gasket
- The seal between the cylinder head and the engine block
- Sleep Mode
- The low-power state control modules enter when the car is parked; if one stays awake the battery can go flat
Frequently asked questions
What are the common faults with the Land Rover Range Rover 4.6?
This guide contains 15 workshop bulletins for the Land Rover Range Rover 4.6. Of these, three concern the engine and fuel system and three the electrical and ignition. Symptoms, causes, repair steps and part numbers are shown where supplied.
Does every Land Rover Range Rover 4.6 have these faults?
No. These are patterns documented across the model by workshops, not predictions for an individual vehicle. Where a fault applies only to certain vehicles or VIN ranges, that is listed with the fault.
Can I check for Land Rover Range Rover 4.6 faults myself?
Many of them. The documented symptoms can be seen, heard or felt during a test drive.