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.
2008 Lexus ES 350 V6-3.5L (2GR-FE)FACTORY OEM SERVICE PROCEDURE
Air Flow Meter/Sensor: Testing and Inspection
2GR-FE ENGINE CONTROL SYSTEM: MASS AIR FLOW METER:
ON-VEHICLE INSPECTION
1. CHECK MASS AIR FLOW METER
NOTICE:
- Perform the MAF meter inspection according to the procedures below.
- Only replace the MAF meter when the MAF value in the DATA LIST (with the engine stopped) is not within the normal operating range or there is foreign matter on the MAF meter platinum hot wire (heater).
(a) Read value using Techstream (MAF).
NOTICE:
- Perform the inspection with the vehicle indoors and on a level surface.
- Perform the inspection of the MAF meter while it is installed to the air cleaner case (installed to the vehicle).
- During the test, do not use the exhaust air duct to perform suction on the exhaust pipe.
(1) Connect the Techstream to the DLC3.
(2) Turn the engine switch on (IG) (do not run the engine).
(3) Turn the Techstream on.
(4) Select the following menu items: Powertrain / Engine / Data List / MAF.
(5) Wait 30 seconds, and read the values on the Techstream.
Standard condition:
If the result is not as specified, replace the MAF meter.
If the result is within the specified range, inspect the cause of the extremely rich or lean air fuel ratio.
Factory Service Tools
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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.