Inspection Procedure

NOTE: Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, as well as other data from the time when a malfunction occurred.

Are there any other codes (besides DTC P0101) being output?

PREPARATION:

Connect the hand-held tester or the OBD II scan tool to the DLC3.
Turn the ignition switch ON and push the hand-held tester or the OBD II scan tool main switch ON.
When using hand-held tester, enter the following menu: DIAGNOSIS/ENHANCED OBD II/DTC INFO/ CURRENT CODES.

CHECK:

Read the DTC using the hand-held tester or the OBD II scan tool.

RESULT:

DTC OUTPUT DISPLAY

Display (DTC output)	Proceed to
"P0101" and other DTCs	A
Only P0101	B

NOTE: If any other codes besides P0101 are output, perform the troubleshooting for those codes first.

B: Replace mass air flow meter.
A: Go to relevant DTC chart (See DIAGNOSTIC TROUBLE CODE CHART ).