Buy OEM 2012 Lexus Part # 1220431040 (12204-31040). PCV Valve. PCV Valve - Repair or Replace If your PCV system is malfunctioning, you may notice any of several symptoms: if your tailpipe

VALVE SUB-ASSY, VENTILATION

Fits ES 350, GS 300, IS 250, RX 350

PCV Valve - Repair or Replace
If your PCV system is malfunctioning, you may notice any of several symptoms: if your tailpipe smokes or your engine idle speed is high or erratic, the PCV valve or its associated parts may need service. You may also notice that the dipstick in your 2012 Lexus won't stay in the dipstick tube, or that your oil cap hisses as the engine is running.