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#TOYOTA DIAGNOSTIC CODES CODE#
If you have this code along with P0171 and P0174, ignore the P0300.
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Definitionīoth of these codes are generic, which means they have the same meaning (Highlander or not).
![toyota diagnostic codes toyota diagnostic codes](https://www.toyotaguru.us/engine-control-systems/images/1846_557_462-trouble-pics.png)
When they appear together, it indicates that the entire engine is running lean. By themselves, these are some of the most common OBD2 codes. P0171 and P0174 both indicate that there is a lean condition present in your Toyota Highlander.