Problems of the lambda sensor on Toyota: affected models and engines
In 9 models from Toyota there are 3 documented faults of the lambda sensor. The most important: lambda sensor failure on the 1AZ-FE (RAV4 and Avensis 2.0 VVT-i), air mass meter and lambda sensor failures and faulty lambda sensor (P0420 code) on the 1.0 VVT-i.
Documented faults, from most to least important
Severity × frequency. Below each one, the Toyota models it appears in.
In RAV4 II and RAV4 III
In Avensis T25, Corolla IX, Corolla Verso and RAV4 II
In Aygo I, Aygo II, Aygo X and iQ
By Toyota model
Open yours to see only the faults that affect it, by engine and by year.
- Toyota RAV4 II (2000–2005)2 faults
- Toyota Corolla IX (2002–2007)1 fault
- Toyota Avensis T25 (2003–2008)1 fault
- Toyota Corolla Verso (2004–2009)1 fault
- Toyota Aygo I (2005–2014)1 fault
- Toyota RAV4 III (2005–2012)1 fault
- Toyota iQ (2008–2015)1 fault
- Toyota Aygo II (2014–2022)1 fault
- Toyota Aygo X (2022–today)1 fault
Engines and gearboxes involved
Frequently asked questions
What faults of the lambda sensor do Toyota cars have?
In 9 models from Toyota there are 3 documented faults of the lambda sensor. The most important: lambda sensor failure on the 1AZ-FE (RAV4 and Avensis 2.0 VVT-i), air mass meter and lambda sensor failures and faulty lambda sensor (P0420 code) on the 1.0 VVT-i. Each fault has its own page with the affected years and versions, the symptoms and the repair cost.
Which Toyota models have the most problems of the lambda sensor?
Toyota RAV4 II (2 faults), Toyota Corolla IX (1 fault), Toyota Avensis T25 (1 fault) and Toyota Corolla Verso (1 fault).
Which Toyota engines have faults of the lambda sensor?
1.0 VVT-i (1 fault), 1.4, 1.6 and 1.8 VVT-i (1 fault) and 2.0 and 2.4 VVT-i (1 fault).