Toyota2011–2019

Yaris 1.0 VVT-i: Common faults & known problems

Common faults & known problems

9 known faults documented in workshop bulletins. Of these, four concern the engine and fuel system and two the body and trim. Symptoms, causes, repair steps and part numbers are shown where supplied.

Technical specifications

Engine & fuel system

4 documented faults — symptoms, causes and workshop fixes.

Unable to remove in-tank fuel pump

Overview

Affects
All models with in-tank fuel pump assembly retaining ring.
Remedy
Fit new part

Cause

Retaining ring for fuel pump assembly seized to fuel tank.

Repair

  1. Cut through retaining ring to enable removal from fuel tank. Avoid damaging fuel tank threads.
  2. Inspect fuel tank threads for damage. If fuel tank threads damaged or new retaining ring will not tighten: Fit new fuel tank.

Data: Motorwise Workshop. Bulletin 1.

Abnormal noise from engine cooling system when decelerating between 3200-3500rpm

Affects All models with 1KR-FE engine code, →06/17.Fit modified part

Cause

Thermostat incorrectly manufactured.

Repair

  1. Fit modified thermostat.
Parts1 part
Parts listed in the bulletin
PartPart numberQty
Thermostat90916-031531

Data: Motorwise Workshop. Bulletin 4.

Engine malfunction indicator lamp (MIL) illuminated. Trouble code stored: P0011

Affects All models with 1KR-FE engine code, →11/15.P0011Fit modified part

Cause

Camshaft position (CMP) actuator vent hole blocked due to unsatisfactory design.

Repair

  1. Fit modified camshaft position (CMP) actuator.
Parts1 part
Parts listed in the bulletin
PartPart numberQty
Camshaft position (CMP) actuator15330-0Q0211

Data: Motorwise Workshop. Bulletin 5.

Engine malfunction indicator lamp (MIL) illuminated. Possible trouble codes stored: P0139, P0141, P0140

Overview

Affects
All models with 1KR-FE engine code, →06/16.
Fault codes
P0139P0141P0140
Remedy
Fit modified part
Parts
2 parts

Cause

Heated oxygen sensor (HO2S) 2 internal damage due to engine control module (ECM) software fault.

Repair

  1. Fit modified heated oxygen sensor (HO2S).
  2. Re-program ECM with upgraded software. Note: To carry out an effective repair a software upgrade will be required - refer to manufacturer.
Parts2 parts
Parts listed in the bulletin
PartPart numberQty
Heated oxygen sensor (HO2S) (Aygo)89465-0H0501
Heated oxygen sensor (HO2S) (Yaris)89465-0D2401

Data: Motorwise Workshop. Bulletin 6.

Electrical & ignition

1 documented fault — symptoms, causes and workshop fixes.

Unable to turn ignition switch with key

Affects All models, 05/14-09/18.Fit modified part

Cause

Unsatisfactory design of ignition switch.

Repair

  1. Fit modified ignition switch and steering column lock.

Data: Motorwise Workshop. Bulletin 9.

Steering

1 documented fault — symptoms, causes and workshop fixes.

Knocking noise when turning steering wheel

Overview

Affects
All models, →02/15.
Remedy
Fit modified part

Cause

Unsatisfactory design of steering column.

Repair

  1. Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
  2. If no fault(s) found: Fit modified steering column.

Data: Motorwise Workshop. Bulletin 7.

Body & trim

2 documented faults — symptoms, causes and workshop fixes.

Whistling noise from rear of vehicle at constant speed between 40-50mph (60-80kph)

Affects All models with digital audio broadcast (DAB) audio unit, →03/17.Fit modified part

Cause

Unsatisfactory design of roof aerial.

Repair

  1. Fit modified roof aerial.

Data: Motorwise Workshop. Bulletin 2.

Tailgate difficult to open/close

Affects All models, →07/14.Fit modified part

Cause

Unsatisfactory design of tailgate weather seal.

Repair

  1. Fit modified tailgate weather seal.
Parts1 part
Parts listed in the bulletin
PartPart numberQty
Tailgate weather seal67881-0D0711

Data: Motorwise Workshop. Bulletin 3.

Other

1 documented fault — symptoms, causes and workshop fixes.

Parking aid warning devices activated with no obstructions present

Overview

Affects
All models with parking aid control.
Remedy
Fit new part
Parts
1 part

Cause

Parking aid control module faulty.

Repair

  1. Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
  2. If no fault(s) found: Fit new parking aid control module.
Parts1 part
Parts listed in the bulletin
PartPart numberQty
Parking aid control modulePW501-0D5501

Data: Motorwise Workshop. Bulletin 8.

Glossary

Technical terms used in this guide.

ECM
Engine control module — the electronic unit that manages the engine
CMP
Camshaft position — a sensor that tells the engine control module where the camshaft is
DAB
Digital audio broadcast — digital radio
Actuator
A motor or solenoid that moves a mechanical part on command
Control Module
A control unit for one of the vehicle's systems (engine, gearbox, brakes, body, and so on)
In-Tank Fuel Pump
The fuel pump mounted inside the fuel tank
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

Frequently asked questions

What are the common faults with the Toyota Yaris 1.0 VVT-i?

This guide contains nine workshop bulletins for the Toyota Yaris 1.0 VVT-i. Of these, four concern the engine and fuel system and two the body and trim. Symptoms, causes, repair steps and part numbers are shown where supplied.

Does every Toyota Yaris 1.0 VVT-i 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 Yaris 1.0 VVT-i faults myself?

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

Related guides

Glossary term

See in the glossary →