DTC P0100-64: Mass or Volume Air Flow Sensor "A" Signal Plausibility Failure [10/2015 - 08/2016]: Procedure

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2024 Lexus RC 300, 2023 Lexus RC 300, 2022 Lexus RC 300, 2021 Lexus RC 300, and 2020 Lexus RC 300. 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 [10/2015 - 08/2016]

Result:

See step 2

CHECK INTAKE SYSTEM

Check the intake system for vacuum leaks and blockage.

Refer to ON-VEHICLE INSPECTION [10/2015 - ]

No leaks or blockage.

HINT:

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

Refer to INITIALIZATION [10/2015 - 10/2018]

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 PROCEDURE - Step 2

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

REPLACE MASS AIR FLOW METER SUB-ASSEMBLY

Replace the mass air flow meter sub-assembly.

Refer to REMOVAL [10/2015 - ]

HINT:

Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

Refer to INITIALIZATION [10/2015 - 10/2018]

Result

Proceed to
NEXT

Result:

See step 5

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Clear the DTCs.
Powertrain > Engine > Clear DTCs
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG).
Turn the Techstream on.
Start the engine and warm it up.
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