DTC Troubleshooting: P0101
DTC P0101: MAF Sensor Circuit Range/Performance Problem
NOTE:
Before you troubleshoot, record all freeze data and any on-board snapshot, and 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
Freeze Frame
P0101 MAF Sensor Circuit Range/Performance Problem
      

1.
Parts condition check:

Parts condition check
?1.
Check for poor connections or damage to these parts:
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 filter/cleaner box.

Is it OK?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Reconnect or replace the intake air duct from the throttle body to the air filter/cleaner box.?
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.
Press the engine start/stop button to select the OFF mode.

?2.
Press the engine start/stop button to select the ON mode.

?3.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
MAF SENSOR
About 0.2
g/s
    

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.

?2.
Vary the engine speed between 2,000 rpm and 3,000 rpm.

?3.
Check the MAF SENSOR in the DATA LIST with the HDS.
Signal
Current conditions
Values
Unit
MAF SENSOR
    

Does the reading change?

     
YES
     
     
     
Go to step 6.
     
NO
     
     
     
6.
MAF sensor check:

MAF sensor check
?1.
Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.

?2.
Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:
ENGINE SPEED
VEHICLE SPEED
MAP SENSOR
TP SENSOR
Signal
Current conditions
Values
Unit
ENGINE SPEED
    
VEHICLE SPEED
    
MAP SENSOR
    
TP SENSOR
    

?3.
Monitor the OBD STATUS for DTC P0101 with the HDS.
DTC Description
OBD STATUS
P0101 MAF Sensor Circuit Range/Performance Problem
 

Does the HDS indicate FAILED?

     
YES
     
     
     
     
NO
     
     
     
If the HDS indicates PASSED, 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 freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot. If the HDS indicates NOT COMPLETED, go to step 6-2 and recheck.?