DTC P0101: Mass Air Flow Circuit Range / Performance Problem [08/2015 - 08/2018]: Procedure

WARNING: This page is about a different car, the 2018 Toyota Sequoia, 2017 Toyota Sequoia, and 2016 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0101)

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Read DTCs.

RESULT

Result	Proceed to
P0101 is output	A
P0101 and other DTCs are output	B

HINT:

If any DTCs other than P0101 are output, troubleshoot those DTCs first.

Result:

GO TO DTC CHART

Refer to:

DIAGNOSTIC TROUBLE CODE CHART [08/2015 - 10/2016]

DIAGNOSTIC TROUBLE CODE CHART [10/2016 - 08/2017]

DIAGNOSTIC TROUBLE CODE CHART [08/2017 - 08/2018]

Result:

See step 2

CHECK AIR INDUCTION SYSTEM
1. Check the air induction system for vacuum leakage (Refer to PROCEDURE - Step 4 ).
  OK
  
  No leakage from air induction system.
  
  HINT:
  
  Perform "Inspection After Repair" after repairing or replacing the air induction system. Refer to
  
  INITIALIZATION [08/2015 - 08/2017]
  
  INITIALIZATION [08/2017 - 08/2018] .
Result:

NG

REPAIR OR REPLACE AIR INDUCTION SYSTEM

Result:

OK

See step 3
CHECK PCV HOSE CONNECTIONS
1. Check the PCV hose connections.
  OK
  
  PCV hose is connected correctly and is not damaged.
  
  HINT:
  
  Perform "Inspection After Repair" after replacing the mass air flow meter. Refer to:
  
  INITIALIZATION [08/2015 - 08/2017]
  
  INITIALIZATION [08/2017 - 08/2018] .
Result:

OK

REPLACE MASS AIR FLOW METER

(Refer to REMOVAL [08/2015 - 08/2018] )

Result:

NG

REPAIR OR REPLACE PCV HOSE

(Refer to REMOVAL [08/2015 - 08/2018] )