Toyota2016–2022

C-HR 1.2 Turbo: Common faults & known problems

Common faults & known problems

7 known faults documented in workshop bulletins. Of these, four concern the engine and fuel system and one the electrical and ignition. Symptoms, causes, repair steps and part numbers are shown where supplied.

Technical specifications

Engine & fuel system

4 documented faults — symptoms, causes and workshop fixes.

Abnormal noise from engine bay while driving

Affects All models with 1.2 petrol engine.P0243

Symptoms

Possible trouble code stored in engine control module (ECM) fault memory: P0243.

Cause

Turbocharger (TC) wastegate regulating valve faulty.

Repair

Renew turbocharger (TC) wastegate regulating valve.

Parts1 part

Parts listed in the bulletin
Part	Part number	Qty
Turbocharger (TC) wastegate regulating valve	25819-0W010	1

Data: Motorwise Workshop. Bulletin 1.

Lack of power

Overview

Affects: All models with 8NR-FTS engine code and stop-start, →24/07/18.
Fault codes: P0300P0301P0302P0303P0304
Remedy: Software update
Parts: 1 part

Symptoms

Engine malfunction indicator lamp (MIL) illuminated. Possible trouble code(s) stored: P0300, P0301,P0302, P0303, P0304.

Cause

Engine control module (ECM) software fault.

Faulty ignition coil(s).

Repair

Inspect production number on ignition coil If production number before 8208, replace ignition coil.
Re-program ECM with upgraded software. Note: To carry out an effective repair a software upgrade will be required - refer to manufacturer.

Parts1 part

Parts listed in the bulletin
Part	Part number	Qty
Ignition coil	90919-02271	As required

Data: Motorwise Workshop. Bulletin 2.

Abnormal noise in area of bulkhead

Overview

Affects: All models with 8NR-FTS engine code, →01/18.
Remedy: Fit modified part
Parts: 2 parts

Cause

Turbocharger (TC) wastegate regulating valve vibrating due to vacuum pressure fluctuations.

Repair

Fit modified turbocharger (TC) wastegate regulating valve vacuum pipe.
Fit additional vacuum pipe retaining clip as shown.

Parts2 parts

Parts listed in the bulletin
Part	Part number	Qty
Vacuum pipe	25781-47030	1
Retaining clip	23841-28050	1

Data: Motorwise Workshop. Bulletin 4.

Engine malfunction indicator lamp (MIL) illuminated. Trouble code stored: P0234

Engine control module (ECM) software fault. Fix: fit a new part.

Overview

Affects: All models with 8NR-FTS engine code, →12/17.
Fault codes: P0234
Remedy: Fit new part

Symptoms

Loss of engine power.

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 engine control module (ECM) with upgraded software.
Erase trouble code. If trouble code cannot be erased: Disconnect battery for 5 minutes.
Fit new ECM software version label.

Parts

Parts listed in the bulletin
Part	Part number	Qty
Engine control module (ECM) software version label	89685-20010	1

Data: Motorwise Workshop. Bulletin 5.

Electrical & ignition

1 documented fault — symptoms, causes and workshop fixes.

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

Parts listed in the bulletin
Part	Part number	Qty
Quarter light window seal (RH)	68215-F4011	1
Quarter light window seal (LH)	68216-F4011	1

Data: Motorwise Workshop. Bulletin 6.

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 7.

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 3.

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
TC: Turbocharger — the exhaust-driven compressor that boosts engine power
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
Stop-Start: The system that cuts the engine at idle and restarts it when you pull away
Trouble Code: A standardised fault code stored by a control module, read with a diagnostic tool
Wastegate Regulating Valve: The valve that controls the turbocharger's wastegate, and so the boost pressure

Frequently asked questions

What are the common faults with the Toyota C-HR 1.2 Turbo?

This guide contains seven workshop bulletins for the Toyota C-HR 1.2 Turbo. Of these, four 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 C-HR 1.2 Turbo 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 1.2 Turbo faults myself?

Many of them. The documented symptoms can be seen, heard or felt during a test drive.