Engine & fuel system
1 documented fault — symptoms, causes and workshop fixes.
Engine misfire when engine coolant temperature below 75°C
Overview
- Affects
- All models with 3.0/5.0 petrol engines.
- Fault codes
P0300P0301P0302P0303P0304P0305P0306P0307P0308P0316- Remedy
- Software update
Symptoms
Engine malfunction indicator lamp (MIL) illuminated when engine coolant temperature below 75°C. Trouble codes stored: P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0316.
Cause
Engine control module (ECM) software fault.
Repair
- Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
- If no fault(s) found: Re-program engine control module (ECM) with upgraded software.
Data: Motorwise Workshop. Bulletin 2.
Electrical & ignition
1 documented fault — symptoms, causes and workshop fixes.
Intermittent self-activation of alarm system siren
Symptoms
Audible warning sounds when locking vehicle. Bonnet open warning message displayed in instrument panel.
Cause
Bonnet switch faulty.
Repair
- Fit new bonnet switch. Bonnet switch integral to bonnet latch.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Bonnet switch | LR054331 | 1 |
Data: Motorwise Workshop. Bulletin 1.
Suspension & drivetrain
1 documented fault — symptoms, causes and workshop fixes.
Knocking noise from front suspension when driving over uneven surfaces
Overview
- Affects
- All models.
- Parts
- 1 part
Symptoms
Knocking noise from front suspension when braking at low speed.
Repair
- Replace front suspension lower arm rear bush on both sides.
- Check front wheel alignment and adjust if necessary.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Suspension lower arm rear bush | LR067494 | 2 |
Data: Motorwise Workshop. Bulletin 4.
Steering
1 documented fault — symptoms, causes and workshop fixes.
Steering heavy
Symptoms
Noise from steering column when driving over uneven surfaces or when manoeuvring or parking.
Cause
Water ingress into steering column lower universal joint causing corrosion.
Repair
- Fit new steering column lower shaft.
Parts2 parts
| Part | Part number | Qty |
|---|---|---|
| Steering column lower shaft - RHD | LR071146 | 1 |
| Steering column lower shaft - LHD | LR071147 | 1 |
Data: Motorwise Workshop. Bulletin 5.
Clutch & gearbox
1 documented fault — symptoms, causes and workshop fixes.
Warning message 'Transmission Fault' displayed in instrument panel
Overview
- Affects
- All models with 8HP70 transmission code, 2014-16.
- Fault codes
P0780- Remedy
- Software update
Symptoms
Transmission control module (TCM) in limp home mode. Trouble code stored: P0780.
Cause
Transmission control module (TCM) software fault.
Repair
- Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
- If no fault(s) found: Re-program transmission control module (TCM) with upgraded software. Note: To carry out an effective repair a software upgrade will be required - refer to manufacturer.
Data: Motorwise Workshop. Bulletin 3.
Air conditioning & heating
1 documented fault — symptoms, causes and workshop fixes.
AC/heater outlet air temperature does not correspond to setting
Poor sealing of in-car temperature sensor air intake ducting allowing air to escape.
Overview
- Affects
- All models.
Repair steps
- Remove in-car temperature sensor air intake ducting assembly.
- Fit foam pad to in-car temperature sensor air intake ducting. Ensure foam pad covers edges of air intake ducting.
- Refit in-car temperature sensor air intake ducting assembly.
Parts
| Part | Part number | Qty |
|---|---|---|
| Foam pad | ETD 500550 | 1 |
Data: Motorwise Workshop. Bulletin 7.
Other
1 documented fault — symptoms, causes and workshop fixes.
Cracking noise from left hand speakers in DAB mode
Overview
- Affects
- All models with digital audio broadcast (DAB) audio unit.
- Remedy
- Software update
Cause
Digital audio broadcast (DAB) control module software fault.
Repair
- Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
- If no fault(s) found: Re-program digital audio broadcast (DAB) control module with upgraded software. Note: To carry out an effective repair a software upgrade will be required - refer to manufacturer.
Data: Motorwise Workshop. Bulletin 6.
Glossary
Technical terms used in this guide.
- MIL
- Malfunction indicator lamp — the engine warning light on the dashboard
- ECM
- Engine control module — the electronic unit that manages the engine
- Trouble Codes
- Standardised fault codes stored by the engine control module, read with a diagnostic tool
- DAB
- Digital audio broadcast — digital radio
- TCM
- Transmission control module — the electronic unit that manages the gearbox
- Control Module
- A control unit for one of the vehicle's systems (engine, gearbox, brakes, body, and so on)
- Engine Coolant Temperature
- How hot the engine is, read by a sensor the engine control module uses for fuelling and cooling fans
- In-Car Temperature
- The cabin-temperature sensor used by the climate control
- Instrument Panel
- The dashboard display that shows warning lights and messages
- Limp Home
- A protective mode that limits power so the vehicle can be driven to a workshop
- Re-Program
- Update the software on a control module using the manufacturer's diagnostic tool
- Trouble Code
- A standardised fault code stored by a control module, read with a diagnostic tool
- Bonnet Switch
- The switch that tells the alarm whether the bonnet is open
- Bush
- A rubber mounting that lets a suspension or body joint move without metal-to-metal contact
- Lower Arm
- A suspension link that locates the wheel at the bottom of the hub
- Universal Joint
- A flexible coupling in a driveshaft that lets it bend as the suspension moves
Frequently asked questions
What are the common faults with the Land Rover Discovery 4 Discovery 3.0 S/C?
This guide contains seven workshop bulletins for the Land Rover Discovery 4 Discovery 3.0 S/C. Of these, one concerns the engine and fuel system and one the electrical and ignition. Symptoms, causes, repair steps and part numbers are shown where supplied.
Does every Land Rover Discovery 4 Discovery 3.0 S/C 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 Discovery 4 Discovery 3.0 S/C faults myself?
Many of them. The documented symptoms can be seen, heard or felt during a test drive.