DTC Troubleshooting: P2227
DTC P2227: BARO 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 P0107, P0108, P1128, and/or P1129 are stored at the same time as DTC P2227, troubleshoot those DTCs first, then recheck for DTC P2227.

DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P2227 BARO Sensor Circuit Range/Performance Problem
      

1.
BARO Sensor performance check:

BARO Sensor performance check
?1.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?2.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
BARO SENSOR
About 101
kPa
    

Do the current condition(s) match the threshold?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
Update the PCM if it does not have the latest software, or substitute a known-good PCM, then do the repair verification.
2.
Problem verification:

Problem verification
?1.
Clear the DTC with the HDS.


?2.
Start the engine. 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.

?3.
Test-drive under these conditions:
Engine coolant temperature (ECT SENSOR 1) above 158 °F (70 °C)
A/T in D, M/T in 4th or 5th
Throttle position between 12 and 25 degrees for at least 5 seconds

Signal
Current conditions
Values
Unit
ECT SENSOR 1
    
REL TP SENSOR
    

?4.
Monitor the OBD STATUS for DTC P2227 with the HDS.
DTC Description
OBD STATUS
P2227 BARO Sensor Circuit Range/Performance Problem
  

Does the HDS indicate FAILED?

     
YES
     
     
     
The failure is duplicated. Go to step 3.
     
NO
     
     
     
If the HDS indicates PASSED, intermittent failure, the system is OK at this time. If the HDS indicates NOT COMPLETED, go to step 2-2 and recheck.
3.
Intake air system check:

Intake air system check
?1.
Check the intake air system for clogging or restrictions (foreign material, dirty air cleaner element, etc.).

Is the intake air system clogged or restricted?

     
YES
     
     
     
Remove the clog or restriction, then do the repair verification.
     
NO
     
     
     
Update the PCM if it does not have the latest software, or substitute a known-good PCM, then do the repair verification.
Repair verification (OBD STATUS check):

?1.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?2.
Reset the PCM with the HDS.


?3.
Do the PCM idle learn procedure.

?4.
Start the engine. 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.

?5.
Test-drive under these conditions:
Engine coolant temperature (ECT SENSOR 1) above 158 °F (70 °C)
A/T in D, M/T in 4th or 5th
Throttle position between 12 and 25 degrees for at least 5 seconds

Signal
Current conditions
Values
Unit
ECT SENSOR 1
    
REL TP SENSOR
    

?6.
Monitor the OBD STATUS for DTC P2227 with the HDS.
DTC Description
OBD STATUS
P2227 BARO Sensor Circuit Range/Performance Problem
  


Does the HDS indicate PASSED, FAILED, or NOT COMPLETED?

     
PASSED
     
     
     
Troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.?
     
FAILED
     
     
     
Go to step 1 and recheck. If the PCM was updated, substitute a known-good PCM, then check the OBD STATUS again.
     
NOT COMPLETED
     
     
     
Meet the test condition, and check the OBD STATUS again.