DTC P0101: Mass Air Flow Circuit Range / Performance Problem (FROM 12/2010): Procedure
WARNING: This page is about a different car, the 2011 Toyota Avalon. 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 Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine / Trouble Codes.
- Read the DTCs.
Result
Result Proceed to DTC P0101 is output A DTC P0101 and other DTCs are output B HINT:
If any DTCs other than P0101 are output, troubleshoot those DTCs first.
B → See step 4
A: Go to next step
- CHECK INTAKE SYSTEM
- Check the intake system for vacuum leaks. Refer to ON-VEHICLE INSPECTION
.
OK
No leaks from intake system.
NG → REPAIR OR REPLACE INTAKE SYSTEM
OK: Go to next step
- Check the intake system for vacuum leaks. Refer to ON-VEHICLE INSPECTION
.
- CHECK PCV HOSE CONNECTIONS
- Check the PCV hose conditions.
OK
PCV hose is connected correctly and is not damaged.
NG → REPAIR OR REPLACE PCV HOSE
OK → REPLACE MASS AIR FLOW METER
- Check the PCV hose conditions.
- GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART