DTC P0100-64: Mass or Volume Air Flow Sensor "A" Signal Plausibility Failure [06/2018 - 08/2021]: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 350, 2023 Lexus ES 350, 2022 Lexus ES 350, 2021 Lexus ES 350, and 2020 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0100-64)

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Enter the following menus: Powertrain / Engine / Trouble Codes.

Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Result	Proceed to
DTC P0100-64 is output	A
DTC P0100-64 and other DTCs are output	B

HINT:

If any DTCs other than P0100-64 are output, troubleshoot those DTCs first.

Result:

GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [06/2018 - 07/2019] , or refer to DIAGNOSTIC TROUBLE CODE CHART [07/2019 - 08/2020] , or refer to DIAGNOSTIC TROUBLE CODE CHART [08/2020 - 08/2021]

Result:

See step 2

CHECK INTAKE SYSTEM

Check the intake system for vacuum leaks.

Refer to ON-VEHICLE INSPECTION [06/2018 - ]

No leaks from the intake system.

HINT:

Perform "Inspection After Repair" after repairing or replacing the intake system.

Refer to INITIALIZATION [06/2018 - 07/2019] , or refer to INITIALIZATION [07/2019 - ]

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE INTAKE SYSTEM

Result:

See step 3

CHECK PCV HOSE CONNECTIONS

Check the PCV hose connections.

Refer to COMPONENTS [06/2018 - ]

PCV valve and hose are connected correctly and are not damaged.

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE PCV HOSE

Result:

See step 4

INSPECT MASS AIR FLOW METER SUB-ASSEMBLY

Inspect the mass air flow meter sub-assembly.

Refer to ON-VEHICLE INSPECTION [06/2018 - ]

Result

Proceed to
NEXT

Result:

See step 5

CLEAR DTC

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Clear the DTC.
Powertrain > Engine > Clear DTCs

Turn the engine switch off and wait for at least 30 seconds.

Result

Proceed to
NEXT

Result:

See step 6

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility

Tester Display
All Readiness

Input the DTC: P0100-64.

Check the DTC judgment result.

Techstream Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions

Result

Proceed to
NEXT

Result:

END