DTC P122E: High Pressure Fuel Pump Leak Malfunction [11/2016 - ]: Description

WARNING: This page is about a different car, the 2019 Toyota Highlander, 2018 Toyota Highlander, and 2017 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.

When the pressure decrease mechanism (orifice) inside the fuel pump assembly (for high pressure side) becomes clogged and the fuel pressure remains high, a DTC is output. Freeze frame data, which records conditions present at the time the DTC was stored, can be confirmed using the Techstream. By confirming whether there were problems with driveability due to a problem in decreasing the fuel pressure improves serviceability.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P122E	High Pressure Fuel Pump Leak Malfunction	All conditions are met and the fuel pressure (for high pressure side) is 2400 kPa or higher for 10 seconds or more (1 trip detection logic): The fuel injection is not direct injection. The fuel pump assembly (for high pressure side) is not operating (pump output is 0 mm³ /st). Within 20 seconds after stopping the engine.	-	Does not come on	DTC stored