DTC Troubleshooting: P0101
DTC P0101: MAF Sensor Circuit Range/Performance Problem (Out of Range)
NOTE:
Before you troubleshoot, review the general troubleshooting information.
If DTC P2073, P2074, P2228, and/or P2229 are stored at the same time as DTC P0101, troubleshoot those DTCs first, then recheck for DTC P0101.

DTC Description
Confirmed DTC
Pending DTC
P0101 MAF Sensor Circuit Range/Performance Problem (Out of Range)
    

1.
Parts condition check:

Parts condition check
?1.
Check for poor connections or damage to these parts:
PCV valve
PCV hose
Intake air duct
Air cleaner
Purge (PCS) line
Brake booster
Brake booster hose

Are the parts OK?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
Repair or replace the damaged part(s).?
2.
Intake air duct visual check:

Intake air duct visual check
?1.
Check for damage or looseness of the intake air duct from the throttle body to the air cleaner.

Is it OK?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Reconnect or replace the intake air duct from the throttle body to the air cleaner.?
3.
Air cleaner element visual check:

Air cleaner element visual check
?1.
Check for a dirty air cleaner element.

Is it dirty?

     
YES
     
     
     
     
NO
     
     
     
Go to step 4.
4.
MAF sensor signal check (without engine running):

MAF sensor signal check (without engine running)
?1.
Turn the vehicle to the ON mode.

?2.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
MAF Sensor
520?10000
Hz
    

Do the current condition(s) match the threshold?

     
YES
     
     
     
Go to step 5.
     
NO
     
     
     
5.
MAF sensor signal check (with engine running):

MAF sensor signal check (with engine running)
?1.
Start the engine and let it idle.

?2.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
MAF Sensor
520?10000
Hz
    

Do the current condition(s) match the threshold?

     
YES
     
     
     
Go to step 6.
     
NO
     
     
     
6.
Problem verification:

Problem verification
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Turn the vehicle to the ON mode.

?3.
Clear the DTC with the HDS.


?4.
Wait 3 seconds or more.

?5.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P0101 MAF Sensor Circuit Range/Performance Problem (Out of Range)
    

Is DTC P0101 indicated?

     
YES
     
     
     
The failure is duplicated. Replace the MAF sensor/IAT sensor.?
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MAF sensor/IAT sensor and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?