DTC Troubleshooting: P049D
DTC P049D: EGR Control Position Exceeded Learning Limit
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
P049D EGR Control Position Exceeded Learning Limit
    

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Turn the vehicle to the OFF (LOCK) mode.

?4.
Turn the vehicle to the ON mode, and wait 10 seconds.

?5.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P049D EGR Control Position Exceeded Learning Limit
    

Is DTC P049D indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the EGR valve 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.?
2.
EGR valve operation check:

EGR valve operation check
?1.
Clear the DTC with the HDS.


?2.
Turn the vehicle to the OFF (LOCK) mode.

?3.
Remove the EGR valve.

?4.
Reconnect the EGR valve 5P connector.

?5.
Turn the vehicle to the ON mode.

?6.
Visually check the EGR valve operation.

Does the EGR valve move to its fully closed position?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Go to step 4.
3.
EGR valve condition check:

EGR valve condition check
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
EGR valve 5P connector

?3.
Check for sludge or carbon on the EGR valve.

Is there sludge or carbon on the EGR valve?

     
YES
     
     
     
Clean the EGR valve and recheck. If DTC P049D is indicated again, replace the EGR valve.?
     
NO
     
     
     
4.
Open wire check (PG3 line):

Open wire check (PG3 line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
EGR valve 5P connector

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
EGR valve 5P connector: disconnected
Test point 1
EGR valve 5P connector (female terminals) No. 1:
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
The PG3 wire is OK. Go to step 5.
     
NO
     
     
     
Repair an open in the PG3 wire between the EGR valve and G101.?
5.
Open wire check (E-EGR line):

Open wire check (E-EGR line)
?1.
Jump the SCS line with the HDS, and wait more than 1 minute.


?2.
Disconnect the following connector.
PCM connector C (51P)

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
EGR valve 5P connector: disconnected
 
PCM connector C (51P): disconnected
Test point 1
EGR valve 5P connector (female terminals) No. 5:
Test point 2
PCM connector C (51P) No. 4


Is there continuity?

     
YES
     
     
     
The E-EGR wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P049D goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the E-EGR wire between the PCM (C4) and the EGR valve.?