P1444 LEXUS - Secondary Air Injection System Switching Valve Stuck Open Bank 2

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

P1444 LEXUS Possible Causes

  • Faulty Vacuum Switching Valve (VSV)
  • VSV for air injection control circuit Bank 2
  • Air switching valve Bank 2
  • VSV for air injection system Bank 2
  • Engine Control Module (ECM)

First diagnose P1444 LEXUS code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

Cost of diagnosing the P1444 LEXUS code

    Labor: 1.0

    The cost of diagnosing the P1444 LEXUS code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

P1444 LEXUS Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1444 LEXUS Meaning

The Engine Control Module (ECM) detects pressure change with the pressure sensor to determine malfunctioning parts in the system,and stores the DTCs. The ECM measures pressure and/or exhaust pulsation of the system at 6 points, A to F, when the air injection system is in operation or when not in operation. When the pressure is high, the ECM determines that the pump operates. When exhaust pulsation is detected, the ECM determines that the ASV is open. The ECM determines malfunction parts based on the measured value, and stores the DTCs.

Points A and B:

ECM detects pressure changes (decrease), and determines that the ASV No.2 is open.

Points C and F:

ECM detects pressure and exhaust pulsation, and determines the pressure pattern of the system.

Point D:

ECM operate the system, as indicated by the dashed lines, to determine which of the ASV No.2 is malfunctioning only when pressure changes cannot be detected at point B.

Point E:

ECM detects exhaust pulsation to determine the condition of the system.

OBDII Code P1444 LEXUS - Secondary Air Injection System Switching Valve Stuck Open Bank 2 - Engine-Codes.com

P1444 LEXUS More Information

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