Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2009TUNDRA 2WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSAIR FLOW METER/SENSORTESTING AND INSPECTIONON-VEHICLE INSPECTION
2009 Toyota Tundra 2WD V8-4.7L (2UZ-FE)
On-Vehicle Inspection
2009 Toyota Tundra 2WD V8-4.7L (2UZ-FE)SECTION On-Vehicle Inspection
2UZ-FE ENGINE CONTROL SYSTEM: MASS AIR FLOW METER: ON-VEHICLE INSPECTION
ON-VEHICLE INSPECTION
1. CHECK MASS AIR FLOW METER
(a) Check the mass air flow value.
(1) Connect the Techstream to the DLC3.
(2) Turn the ignition switch to ON.
(3) Push the Techstream main switch ON.
(4) Enter the following menus: Powertrain / Engine / Data List / All Data / MAF.
(5) Blow air into the MAF meter, and check that the MAF value fluctuates.
If the result is not as specified, check the MAF meter Inspection, or wiring and ECM P0102.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.