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Home >> Lexus >> 2007 >> LX 470 >> Repair and Diagnosis >> Engine Performance >> Engine Control System (2UZ-FE) >> SFI System >> DTC P1442 Stuck Close in Secondary Air Injection Vacuum Switching Valve Bank 1; DTC P1445 Stuck Close in Secondary Air Injection Vacuum Switching Valve Bank 2; DTC P2441 Secondary Air Injection System Switching Valve Stuck Close Bank 1 >> Description

DTC P1442 Stuck Close in Secondary Air Injection Vacuum Switching Valve Bank 1; DTC P1445 Stuck Close in Secondary Air Injection Vacuum Switching Valve Bank 2; DTC P2441 Secondary Air Injection System Switching Valve Stuck Close Bank 1: Description

Refer to DTC P0412  .

DTC DETECTION CONDITION AND TROUBLE AREA

DTC No. DTC Detection Condition Trouble Area
P1442 No. 2 air switching valve (bank 1) stuck closed:
No pressure change (decrease) after the ECM sends an open No. 2 air switching valve (bank 1) signal.
(2 trip detection logic)
  • VSV for air injection system circuit (bank 1)
  • Vacuum hose (VSV for air injection system - No. 2 air switching valve)
  • Air injector pipe (No. 2 air switching valve - exhaust manifold)
  • No. 2 air switching valve (bank 1)
  • VSV for air injection system (bank 1)
  • ECM
P1445 No. 2 air switching valve (bank 2) stuck closed:
No pressure change (decrease) after the ECM sends an open No. 2 air switching valve (bank 2) signal.
(2 trip detection logic)
  • VSV for air injection system circuit (Bank 2)
  • Vacuum hose (VSV for air injection system - No. 2 air switching valve)
  • Air injector pipe (No. 2 air switching valve - exhaust manifold)
  • No. 2 air switching valve (bank 2)
  • VSV for air injection system (bank 2)
  • ECM
P2441 Air switching valve stuck closed:
The pressure sensor does not detect exhaust pulsation when system operates. (All of air switching valve ON) This DTC means either of the following conditions is met.
  1. Electromagnetic air switching valve stuck closed.
  2. Both of "No. 2 air switching valve (bank 1)" and "No. 2 air switching valve (Bank 2)" are stuck closed.

    (2 trip detection logic)
  • Vacuum hoses (Throttle body - VSVs for air injection system)
  • Air switching valve
  • Air injector pipe (No. 2 air switching valve - exhaust manifold)
  • Air injection hose
  • No. 2 air switching valve (bank 1 and/or 2)
  • VSV for air injection system (bank 1 and/or 2)
  • Air injection control driver
  • Air injection control driver circuit
  • ECM
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