Engine & fuel system
5 documented faults — symptoms, causes and workshop fixes.
Engine malfunction indicator lamp (MIL) illuminated. Trouble code stored: P1121
Cause
Internal failure of accelerator pedal position (APP) sensor.
Repair
- Replace APP sensor.
Data: Motorwise Workshop. Bulletin 8.
Excessive vibration through vehicle when stationary with engine idling
Cause
Engine mounting(s) collapsed.
Repair
- Check engine mountings. Replace as necessary.
Data: Motorwise Workshop. Bulletin 9.
Erratic idle
Overview
- Affects
- All models with Diesel engines.
- Fault codes
P1238
Symptoms
Trouble code stored in engine control module (ECM) fault memory: P1238.
Cause
Faulty fuel injector(s).
Repair
- Check fuel injectors for leaks. Repair/replace component(s) as necessary.
- If fuel injector(s) replaced: Carry out injector calibration code programming in engine control module (ECM).
Data: Motorwise Workshop. Bulletin 10.
Black smoke when accelerating from cold start
Symptoms
Engine knock and/or shudder when starting engine from cold. Long cranking time before starting. Trouble code stored: P1604.
Cause
Injectors over-fuelling during pilot injection stage.
Repair
- Test fuel injectors and replace as necessary.
Data: Motorwise Workshop. Bulletin 11.
Engine malfunction indicator lamp (MIL) illuminated. Possible trouble codes stored: P0671, P0672, P0673, P0674
Cause
Defective glow plugs.
Repair
- Fit new glow plugs.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Glow plug | 19850-30030, or 19850-30040 | 4 |
Data: Motorwise Workshop. Bulletin 12.
Electrical & ignition
2 documented faults — symptoms, causes and workshop fixes.
Electric windows not fully closing
Overview
- Affects
- All models.
Cause
Battery has been disconnected.
Window channel movement restricted.
Repair steps
- Check window channel for restrictions.
- Disconnect battery for 10 seconds.
- Reconnect battery.
- Switch ignition ON.
- Open window half way.
- Close window and hold window switch in closed position for approximately 12 seconds.
- Carry out procedure for remaining windows.
- Check one-touch automatic function of windows.
Data: Motorwise Workshop. Bulletin 1.
Reverse lamps not working even though fuse intact
Cause
Additional fuse for reverse lamp circuit blown.
Repair
- Check all fuses. Replace blown fuse(s).
Data: Motorwise Workshop. Bulletin 7.
Brakes
1 documented fault — symptoms, causes and workshop fixes.
Parking brake ON warning lamp illuminates intermittently when driving
Low brake fluid level.
Overview
- Affects
- All models.
Repair steps
- Top up brake fluid to correct level.
- Check brake pad thickness. Replace component(s) as necessary.
- Check for brake fluid leaks. Replace component if necessary.
Data: Motorwise Workshop. Bulletin 6.
Steering
1 documented fault — symptoms, causes and workshop fixes.
Ignition switch turns freely with key, but engine fails to crank
Symptoms
Engine will not crank. Steering column lock not disengaging.
Cause
Internal damage to ignition switch/steering column lock assembly.
Repair
- Fit modified ignition switch/steering column lock assembly.
Data: Motorwise Workshop. Bulletin 4.
Clutch & gearbox
2 documented faults — symptoms, causes and workshop fixes.
Metallic noise from clutch assembly
Cause
Dirt trapped in clutch pressure plate.
Repair
- Fit modified clutch pressure plate and clutch release lever.
Parts2 parts
| Part | Part number | Qty |
|---|---|---|
| Clutch pressure plate | 31210-60251 | 1 |
| Clutch release lever | 31204-60140 | 1 |
Data: Motorwise Workshop. Bulletin 3.
Oil leak from transmission
Overview
- Affects
- All models with automatic transmission (AT).
Cause
Transmission breather hose chafed through on wiring harness.
Repair
- Replace transmission breather hose.
- Ensure suitable clearance between transmission breather hose and surrounding components.
Data: Motorwise Workshop. Bulletin 5.
Wipers & visibility
1 documented fault — symptoms, causes and workshop fixes.
Windscreen wipers not working
Overview
- Affects
- All models, →02/08.
- Remedy
- Fit modified part
- Parts
- 5 parts
Cause
Water ingress into windscreen wiper motor.
Repair
- Fit modified windscreen wiper motor.
- Fit waterproof cover onto windscreen wiper motor.
Parts5 parts
| Part | Part number | Qty |
|---|---|---|
| Windscreen wiper motor - RHD | 85110-60330 | 1 |
| Windscreen wiper motor - LHD | 85110-60350 | 1 |
| Waterproof cover - RHD | 85111-60130 | 1 |
| Waterproof cover - LHD | 85111-60110 | 1 |
| Clamp | 85371-60040 | 1 |
Data: Motorwise Workshop. Bulletin 2.
Glossary
Technical terms used in this guide.
- ECM
- Engine control module — the electronic unit that manages the engine
- Accelerator Pedal Position
- The sensor that tells the engine control module how far the accelerator is pressed
- Control Module
- A control unit for one of the vehicle's systems (engine, gearbox, brakes, body, and so on)
- Fault Memory
- The list of stored trouble codes in a control module
- Glow Plugs
- Heaters that help a diesel engine start from cold
- Trouble Code
- A standardised fault code stored by a control module, read with a diagnostic tool
- Wiring Harness
- The bundled cables that carry power and signals around the vehicle
- Calibration
- Setting a sensor or module so its readings match the real world
Frequently asked questions
What are the common faults with the Toyota Landcruiser Prado 3.0 D-4D?
This guide contains 12 workshop bulletins for the Toyota Landcruiser Prado 3.0 D-4D. Of these, five concern the engine and fuel system and two the electrical and ignition. Symptoms, causes, repair steps and part numbers are shown where supplied.
Does every Toyota Landcruiser Prado 3.0 D-4D 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 Toyota Landcruiser Prado 3.0 D-4D faults myself?
Many of them. The documented symptoms can be seen, heard or felt during a test drive.