Toyota Prius Fault Codes
You can find common Toyota Prius fault codes on this page that when clicked take you to a detailed description.
You can also type in the fault code you are getting below to find a more detailed description.
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Toyota Prius Recall Notices
Common Toyota Prius Codes
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Toyota Prius Recalls
When a car manufacturer detects a problem with a model they put out a recall notice and more often than not offer to fix the problem free of charge.
You can check to see if your Toyota Prius has any recall notices on our sister site AutoRecalls.co, sorted by model year.
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Common Prius Fault Codes
These are the most common Prius fault codes that people are searching for.
7/10
P0420
- Manufacturer: Toyota
About the Prius
Built by the Japanese car manufacturer Toyota, the Prius has always been a hybrid vehicle with an internal combustion engine and electric motor.
Sold as a four-door sedan at first, Toyota later offered a five-door liftback – built on top of the Corolla platform that it shares with the RAV4.
The first generations sold from 1997 onwards and had the industry code name NHW10.
Initially unveiled at the Tokyo motor show, the Prius went on sale in December of the same year and was only available outside of Japan via private importing.
Holding the prestigious title of the very first mass-produced gasoline-electric hybrid car, the vehicle then went on to win Car of the Year.
Three years later, in 2000, Toyota made the decision to offer the car globally following great sales figures; and the second generation debuted at the New York International Auto Show. Completely changed stylistically, the Prius looked less like a traditional car, and moved towards the iconic styling that we see today.
As of 2017, the Prius had sold in over 90 countries with sales reaching 1 million units.
As an iconic hybrid, the car is featured in a number of TV shows, perhaps most notably as Brian’s vehicle in the American cartoon Family Guy.
Several common fault codes are:
- B1421 – The most common Toyota Prius fault code that people come here to diagnose is the B1421. This code is telling you that the solar sensor (a component that detects the sunlight coming through the windscreen) is operating outside of the expected voltage and suggests a faulty sensor.
- P0101 – This code is common among most modern automobiles and suggests that the mass airflow meter is faulty.
- P1150 – For Toyota models, the P1150 fault code represents that there is a problem with the fuel/air sensor located in the front-right of the car.
- P0420 – Showing a low catalyst system efficiency. This means that the oxygen levels are under the required level.
- P0171 – Either too much oxygen or too little fuel in the exhaust system. It could mean that a vacuum leak is present.
- P0401 – A diagnostic code altering the driver’s attention to the detection of exhaust gas recirculation.
- P0117 – This could show for a number of reasons, perhaps an engine coolant temperature sensor circuit low output issue.
- P0446 – A vent control circuit malfunction, meaning that the onboard computer has found a problem with the EVAP system.
