DTC Summary

WARNING: This page is about a different car, the 2006 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

DTC DETECTION CONDITION AND TROUBLE AREA

DTC No.	Monitoring Item	DTC Detection Condition	Trouble Area	Detection Timing	Detection Logic
P2401	Vacuum pump stuck OFF	P043E, P043F, P2401, P2402, P2419 are present when one of the following conditions is met during key-off EVAP monitor: EVAP pressure just after reference pressure measurement more than 755 mmHg Reference pressure less than 730 mmHg Reference pressure more than 755 mmHg Reference pressure is not saturated Reference pressures difference between first and second 5.3 mmHg or more NOTE: These valves are typical	Pump module (0.02 inch orifice, vacuum pump, vent valve) Connector / wire harness (Pump module - ECM ECM	Engine switch off	2 trips
P2402	Vacuum pump stuck ON	P043E, P043F, P2401, P2402, P2419 are present when one of the following conditions is met during key-off EVAP monitor: EVAP pressure just after reference pressure measurement more than 755 mmHg Reference pressure less than 730 mmHg Reference pressure more than 755 mmHg Reference pressure is not saturated Reference pressures difference between first and second 5.3 mmHg or more NOTE: These valves are typical	Pump module (0.02 inch orifice, vacuum pump, vent valve) Connector / wire harness (Pump module - ECM ECM	Engine switch off	2 trips