Stumped

Samtraxx1

New member
20
2
3
Buick Ownership
Lesabre Custom
Have a 2000 ledabre getting code p0401, egr is new, tubes are clear, map sensor doesn't show much change in pressure, which makes me think I might have a blockage in the pcv port somewhere, has anyone else experienced this, and if so how did you correct it
 

Homer Jay

Full Member
451
162
43
New York
Buick Ownership
2001 LeSabre
To confirm you cleared the code and it comes back? If yes, check the wiring and electrical connection at the EGR valve.
 

Bob Connolly

New member
1
0
1
Buick Ownership
2005 LeSabre
Following I have same issue in 05 LeSabre.
______________________________
 

DMR

New member
1
0
1
Buick Ownership
2002 lesabre
Try this:
1 Unplug EGR
2 turn on ignition(no start) 3. run scan 4. clear codes 5. Shut off ignition 6. re connect egr
7 run scan(may have Po4o3 code 8. clear codes
Worked for me, did not have egr code again
 
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