What is the function and operation of the Mass Airflow (MAF) sensor on Toyota Sienna?

The Mass Airflow (MAF) sensor is located on the air intake duct and consists of a platinum hot wire, a thermistor, and a control circuit within a plastic housing. The platinum hot wire and thermistor detect even the slightest changes in the temperature of the intake air passing over them. As the throttle opens, more air passes over the hot wire, cooling it. The MAF sensor circuit maintains the hot wire at a constant preset temperature by controlling the current flow through it; as the wire cools, the PCM increases the current to maintain the temperature. The output voltage signal of the MAF sensor varies with this current flow and is measured by the PCM, which converts the signal into a digital waveform, compares it to a map, calculates the necessary fuel injector pulse width, and activates the injectors accordingly. A problem in the MAF sensor circuit will set a diagnostic trouble code. To service the MAF sensor, ensure the ignition key is in the OFF position, disconnect the electrical connector from the MAF sensor, and remove the mounting screws. Twist the MAF sensor out of the air intake duct and remove the O-ring. Installation is the reverse of removal, ensuring a new gasket or O-ring is installed between the MAF sensor and the intake duct.

Genuine Toyota Sienna Mass Air Flow Sensor

MAF Sensor Meter

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11 Mass Air Flow Sensors found

View related parts
Toyota Sienna Meter Sub-Assy, Intake Air Flow
Part Number: 22204-31020
$132.20 MSRP: $187.95
You Save: $55.75 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Air Mass Sensor, Mass Air Flow Sensor
- Replaces: 22204-0P010, 22204-0H010, 22204-31010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2006-2010 Toyota Sienna | CE, LE, XLE | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSL20L-PFADKK, GSL20L-PFAEKA, GSL20L-PFAEKK, GSL20L-PFAQKA, GSL20L-PFAQKK, GSL20L-PRADKK, GSL20L-PRAEKA, GSL20L-PRAEKK, GSL20L-PRAQKA, GSL20L-PRAQKK, GSL23L-SBADKA, GSL23L-SBADKK, GSL25L-PFADKK, GSL25L-PFAEKA, GSL25L-PFAEKK, GSL25L-PFAQKA, GSL25L-PFAQKK
View related parts
Toyota Sienna Meter Sub-Assembly, INTA
Part Number: 22204-75040
$133.37 MSRP: $189.61
You Save: $56.24 (30%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Meter Sub-Assy, Intake Air Flow; Air Mass Sensor, Mass Air Flow Sensor
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2016-2022 Toyota Sienna | LE, SE, STD, XLE | 4 Cyl 2.5L, 6 Cyl 3.5L | 2GRFKS, A25AFXS; 2GRFKS, A25AFXS; AXLH40L-PNXLHA, AXLH40L-PNXSHA, AXLH40L-PNXXHA, AXLH40L-PPXEHA, AXLH40L-PPXXHA, AXLH45L-PNXLHA, AXLH45L-PNXSHA, AXLH45L-PNXXHA, AXLH45L-PPXEHA, GSL30L-PFZDHA, GSL30L-PFZEHA, GSL30L-PFZQHA, GSL30L-PRZEHA, GSL30L-PRZQHA, GSL30L-PRZSHA, GSL33L-SBZDHA, GSL33L-SEZDHA, GSL35L-PFZEHA, GSL35L-PFZQHA, GSL35L-PFZSHA
View related parts
Toyota Sienna Meter Sub-Assembly, INTA
Part Number: 22204-0V010
$126.00 MSRP: $179.13
You Save: $53.13 (30%)
ADD TO CART
Product Specifications
- Other Name: Meter Sub-Assy, Intake Air Flow; Air Mass Sensor, Mass Air Flow Sensor
- Manufacturer Note: MARK 22204-0V010
- Replaced by: 22204-0V020
- Replaces: 22204-0V020, 22204-0T040, 22204-37010, 22204-0T020, 22204-28010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2011-2017 Toyota Sienna | LE, SE, STD, XLE | 4 Cyl 2.7L, 6 Cyl 3.5L | 1ARFE, 2GRFE; 1ARFE, 2GRFE; ASL30L-PFTEKA, ASL30L-PRTEKA, GSL30L-PFTDKA, GSL30L-PFTEKA, GSL30L-PFTQKA, GSL30L-PRTEKA, GSL30L-PRTQKA, GSL30L-PRTSKA, GSL33L-SBTDKA, GSL35L-PFTDKA, GSL35L-PFTEKA, GSL35L-PFTQKA
View related parts
Toyota Sienna Meter Sub-Assembly, INTA
Part Number: 22204-28010
$203.55 MSRP: $291.86
You Save: $88.31 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Meter Sub-Assy, Intake Air Flow
- Manufacturer Note: MARK 22204-28010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2011-2017 Toyota Sienna | LE, SE, STD, XLE | 4 Cyl 2.7L, 6 Cyl 3.5L | 1ARFE, 2GRFE; 1ARFE, 2GRFE; ASL30L-PFTEKA, ASL30L-PRTEKA, GSL30L-PFTDKA, GSL30L-PFTEKA, GSL30L-PFTQKA, GSL30L-PRTEKA, GSL30L-PRTQKA, GSL30L-PRTSKA, GSL33L-SBTDKA, GSL35L-PFTDKA, GSL35L-PFTEKA, GSL35L-PFTQKA
View related parts
Toyota Sienna Meter Sub-Assy, Intake Air Flow
Part Number: 22204-0H010
$132.20 MSRP: $187.95
You Save: $55.75 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Replaced by: 22204-31020
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2009-2010 Toyota Sienna | CE, LE, XLE | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSL20L-PFADKK, GSL20L-PFAEKA, GSL20L-PFAEKK, GSL20L-PFAQKA, GSL20L-PFAQKK, GSL20L-PRADKK, GSL20L-PRAEKA, GSL20L-PRAEKK, GSL20L-PRAQKA, GSL20L-PRAQKK, GSL23L-SBADKA, GSL23L-SBADKK, GSL25L-PFADKK, GSL25L-PFAEKA, GSL25L-PFAEKK, GSL25L-PFAQKA, GSL25L-PFAQKK
View related parts
Toyota Sienna Meter Sub-Assembly, INTA
Part Number: 22204-0V020
$126.00 MSRP: $179.13
You Save: $53.13 (30%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Meter Sub-Assy, Intake Air Flow
- Manufacturer Note: MARK 22204-0V020
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2011-2017 Toyota Sienna | LE, SE, STD, XLE | 4 Cyl 2.7L, 6 Cyl 3.5L | 1ARFE, 2GRFE; 1ARFE, 2GRFE; ASL30L-PFTEKA, ASL30L-PRTEKA, GSL30L-PFTDKA, GSL30L-PFTEKA, GSL30L-PFTQKA, GSL30L-PRTEKA, GSL30L-PRTQKA, GSL30L-PRTSKA, GSL33L-SBTDKA, GSL35L-PFTDKA, GSL35L-PFTEKA, GSL35L-PFTQKA
View related parts
Toyota Sienna Meter Sub-Assy, Intake Air Flow
Part Number: 22204-07010
$138.98 MSRP: $197.59
You Save: $58.61 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: (L)
- Replaced by: 22204-21010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2000-2003 Toyota Sienna | CE, LE | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCL10L-GFSDKA, MCL10L-GFSDKK, MCL10L-GFSGKA, MCL10L-GFSGKK, MCL10L-PFSDKA, MCL10L-PFSDKK, MCL10L-PFSGKA, MCL10L-PFSGKK, MCL10L-SESDKA, MCL10L-SESDKK
View related parts
Toyota Sienna Meter Sub-Assembly, INTA
Part Number: 22204-0T020
$126.00 MSRP: $179.13
You Save: $53.13 (30%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Meter Sub-Assy, Intake Air Flow
- Manufacturer Note: (L)
- Replaced by: 22204-0V020
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2011-2012 Toyota Sienna | LE, SE, STD, XLE | 4 Cyl 2.7L, 6 Cyl 3.5L | 1ARFE, 2GRFE; 1ARFE, 2GRFE; ASL30L-PFTEKA, ASL30L-PRTEKA, GSL30L-PFTDKA, GSL30L-PFTEKA, GSL30L-PFTQKA, GSL30L-PRTEKA, GSL30L-PRTQKA, GSL30L-PRTSKA, GSL33L-SBTDKA, GSL35L-PFTDKA, GSL35L-PFTEKA, GSL35L-PFTQKA
View related parts
Toyota Sienna Meter Sub-Assy, Intake Air Flow
Part Number: 22204-31010
$132.20 MSRP: $187.95
You Save: $55.75 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 22204-31020
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2006-2008 Toyota Sienna | CE, LE, XLE | 6 Cyl 3.5L | 2GRFE; 2GRFE; GSL20L-PFADKK, GSL20L-PFAEKA, GSL20L-PFAEKK, GSL20L-PFAQKA, GSL20L-PFAQKK, GSL20L-PRADKK, GSL20L-PRAEKA, GSL20L-PRAEKK, GSL20L-PRAQKA, GSL20L-PRAQKK, GSL23L-SBADKA, GSL23L-SBADKK, GSL25L-PFADKK, GSL25L-PFAEKA, GSL25L-PFAEKK, GSL25L-PFAQKA, GSL25L-PFAQKK
View related parts
Toyota Sienna Meter Sub-Assy, Intake Air Flow
Part Number: 22204-0D030
$132.20 MSRP: $187.95
You Save: $55.75 (30%)
ADD TO CART
Product Specifications
- Manufacturer Note: (L)
- Replaced by: 22204-22010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2004-2007 Toyota Sienna | CE, LE, XLE | 6 Cyl 3.3L | 3MZFE; 3MZFE; MCL20L-PFADKK, MCL20L-PFAEKA, MCL20L-PFAEKK, MCL20L-PFAQKA, MCL20L-PFAQKK, MCL20L-PRADKK, MCL20L-PRAEKA, MCL20L-PRAEKK, MCL20L-PRAQKA, MCL20L-PRAQKK, MCL23L-SBADKA, MCL23L-SBADKK, MCL25L-PFADKK, MCL25L-PFAEKA, MCL25L-PFAEKK, MCL25L-PFAQKA, MCL25L-PFAQKK
View related parts
Toyota Sienna Meter Sub-Assy, Intake Air Flow
Part Number: 22204-20010
$207.28 MSRP: $297.22
You Save: $89.94 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Air Mass Sensor, Mass Air Flow Sensor
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1998-2001 Toyota Sienna | CE, LE | 6 Cyl 3.0L | 1MZFE; 1MZFE; MCL10L-GFSDKA, MCL10L-GFSDKK, MCL10L-GFSGKA, MCL10L-GFSGKK, MCL10L-PFSDKA, MCL10L-PFSDKK, MCL10L-PFSGKA, MCL10L-PFSGKK, MCL10L-SESDKA, MCL10L-SESDKK

Toyota Sienna Mass Air Flow Sensor

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Toyota Sienna Mass Air Flow Sensor Parts Questions & Experts Answers

Meter Sub-Assy, Intake Air Flow
22204-31020
Q: What is the function and operation of the Mass Airflow (MAF) sensor on Toyota Sienna?
A: The Mass Airflow (MAF) sensor is located on the air intake duct and consists of a platinum hot wire, a thermistor, and a control circuit within a plastic housing. The platinum hot wire and thermistor detect even the slightest changes in the temperature of the intake air passing over them. As the throttle opens, more air passes over the hot wire, cooling it. The MAF sensor circuit maintains the hot wire at a constant preset temperature by controlling the current flow through it; as the wire cools, the PCM increases the current to maintain the temperature. The output voltage signal of the MAF sensor varies with this current flow and is measured by the PCM, which converts the signal into a digital waveform, compares it to a map, calculates the necessary fuel injector pulse width, and activates the injectors accordingly. A problem in the MAF sensor circuit will set a diagnostic trouble code. To service the MAF sensor, ensure the ignition key is in the OFF position, disconnect the electrical connector from the MAF sensor, and remove the mounting screws. Twist the MAF sensor out of the air intake duct and remove the O-ring. Installation is the reverse of removal, ensuring a new gasket or O-ring is installed between the MAF sensor and the intake duct.