Engine & fuel system
2 documented faults — symptoms, causes and workshop fixes.
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.
Engine coolant leak from throttle body area
Cause
Poor manufacture of throttle body.
Repair
- Fit modified throttle body.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Throttle body | 22030-37040 | 1 |
Data: Motorwise Workshop. Bulletin 4.
Electrical & ignition
2 documented faults — 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 1.
Wind noise from door mirror area when driving
Overview
- Affects
- All models, →07/17.
- Remedy
- Fit modified part
- Parts
- 2 parts
Symptoms
Wind noise from A pillar area when driving.
Cause
Unsatisfactory design of quarter light window seal.
Repair
- Fit modified front quarter light window seal.
- Ensure quarter light window seal is to manufacturer's latest specifications.
Parts2 parts
| Part | Part number | Qty |
|---|---|---|
| Quarter light window seal (RH) | 68215-F4011 | 1 |
| Quarter light window seal (LH) | 68216-F4011 | 1 |
Data: Motorwise Workshop. Bulletin 5.
Body & trim
1 documented fault — symptoms, causes and workshop fixes.
Warning message 'Pre-Collision System Unavailable' displayed in instrument panel
Front view camera control module software fault. Fix: re-program with updated software.
Overview
- Affects
- All models with front view camera.
- Remedy
- Software update
Symptoms
Trouble code stored in front view camera control module fault memory: C1A94.
Repair steps
- Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
- If no fault(s) found: Re-program front view camera control module with upgraded software.
- Erase any stored trouble codes. Note: To carry out an effective repair a software upgrade will be required - refer to manufacturer.
Data: Motorwise Workshop. Bulletin 6.
Other
1 documented fault — symptoms, causes and workshop fixes.
Erratic operation of parking aid control
Overview
- Affects
- All models with parking aid control.
- Remedy
- Software update
Cause
Parking aid 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 parking aid 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.
- Trouble Codes
- Standardised fault codes stored by the engine control module, read with a diagnostic tool
- 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
- Parking Aid
- The reversing/parking sensors and their control module
- 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
- Head Gasket
- The seal between the cylinder head and the engine block
Frequently asked questions
What are the common faults with the Toyota C-HR 1.8 Hybrid Synergy Drive?
This guide contains six workshop bulletins for the Toyota C-HR 1.8 Hybrid Synergy Drive. Of these, two 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 C-HR 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 C-HR 1.8 Hybrid Synergy Drive faults myself?
Many of them. The documented symptoms can be seen, heard or felt during a test drive.