TSB: Some 2013 ? 2020 model year Lexus vehicles may exhibit a hard start and/or MIL ON condition with one or more of the following Diagnostic Trouble Codes (DTCs):
?DTC P0171 and/or P0174 (System Too Lean Bank 1/Bank 2)
?DTC P0087 Fuel Rail / System Pressure ? Too Low
Techstream data list analysis may reveal positive fuel trims including a no pressure condition verified by a manual fuel pressure gauge. Follow the Repair Procedure in this bulletin to address these conditions.
