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DTC P0101: Mass Air Flow Circuit Range / Performance Problem: Procedure

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

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

Read the DTCs.

Result

Display (DTC Output)	Proceed to
P0101 and other codes are output	A
Only P0101 is output	B

HINT:

If any other codes besides P0101 are output, perform troubleshooting for those DTCs first.

B → GO TO RELEVANT DTC CHART

A: Go to next step

CHECK AIR INDUCTION SYSTEM
1. Check the air induction system for vacuum leakage.
  OK
  
  No leakage from air induction system.
NG → REPAIR OR REPLACE AIR INDUCTION SYSTEM

OK: Go to next step
CHECK PCV HOSE
OK

PCV hose is connected correctly and is not damaged.

NG → REPAIR OR REPLACE PCV HOSE

OK → REPLACE MASS AIR FLOW METER