LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2006 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (1ZZ-FE) - SFI System (For 2WD) - DTC P043E Through P2A00 >> DTC P2401 Evaporative Emission System Leak Detection Pump Control Circuit Low; DTC P2402 Evaporative Emission System Leak Detection Pump Control Circuit High >> DTC Summary
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Summary

DTC SUMMARY

DTCs Monitoring Items Malfunction Detection Conditions Trouble Areas Detection Timings Detection Logic
P2401 Vacuum pump stuck OFF Vacuum pump creates negative pressure through 0.02 inch orifice, and EVAP system pressure is measured to determine leak pressure standard. 0.02 inch leak pressure standard is measured at the start and end of the leak check.
If system pressure is higher than - 1.06 kPa (-7.95 mmHg)(1), or lower than -4.85 kPa (-36.38 mmHg)(1), ECM determines that vacuum pump is stuck OFF.
  • Pump module
  • Connector/Wire harness (Pump module - ECM)
  • ECM
 While ignition switch is OFF 2 trip
P2402 Vacuum pump stuck ON Vacuum pump creates negative pressure through 0.02 inch orifice, and EVAP system pressure is measured to determine leak pressure standard.
If system pressure is higher than - 1.06 kPa (-7.95 mmHg)(1), or lower than -4.85 kPa (-36.38 mmHg)(1), ECM determines that vacuum pump is stuck ON.
  • Pump module
  • Connector/Wire harness (Pump module - ECM)
  • ECM
 While ignition switch is OFF 2 trip
(1) The threshold values vary according to the atmospheric pressure measured in operation A. The values described in the table above are based on an atmospheric pressure of 100 kPa (750.1 mmHg).

HINT:

The vacuum pump is built into the pump module.

scientia non olet · About LEMON Manuals