Engine & fuel system
2 documented faults — symptoms, causes and workshop fixes.
Engine difficult to start after standing for 3hours or more
Cause
Unsatisfactory design of injectors.
Repair
- Inspect production number on injectors If production number 0692, replace injectors.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Injector | 23209-39145 | 4 |
Data: Motorwise Workshop. Bulletin 1.
Engine overheating
Overview
- Affects
- All models with 2ZR-FXE engine code.
- Remedy
- Fit modified part
- Parts
- 1 part
Symptoms
Coolant loss with no signs of coolant leak. White smoke coming from exhaust.
Cause
Unsatisfactory design of cylinder head gasket.
Repair
- Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
- If no fault(s) found: Fit modified cylinder head gasket.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Cylinder head gasket | 11115-37090 | 1 |
Data: Motorwise Workshop. Bulletin 3.
Electrical & ignition
1 documented fault — symptoms, causes and workshop fixes.
Very low hybrid battery pack power following long down hill driving
Overview
- Affects
- All models with hybrid drive system, 2016-17.
- Remedy
- Software update
Cause
Hybrid drive system 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 hybrid drive system 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 2.
Glossary
Technical terms used in this guide.
- Control Module
- A control unit for one of the vehicle's systems (engine, gearbox, brakes, body, and so on)
- Re-Program
- Update the software on a control module using the manufacturer's diagnostic tool
- Head Gasket
- The seal between the cylinder head and the engine block
Frequently asked questions
What are the common faults with the Toyota Prius 1.8 Hybrid Synergy Drive?
This guide contains three workshop bulletins for the Toyota Prius 1.8 Hybrid Synergy Drive. Of these, two concern the engine and fuel system and one the electrical and ignition. Symptoms, causes, repair steps and part numbers are shown where supplied.
Does every Toyota Prius 1.8 Hybrid Synergy Drive 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 Prius 1.8 Hybrid Synergy Drive faults myself?
Many of them. The documented symptoms can be seen, heard or felt during a test drive.