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White stuff is getting into my EGR how can I Fit it?

Tiny
JOE1953
  • MEMBER
  • 1997 CHEVROLET LUMINA
  • 176,000 MILES
White stuff is getting into my EGR and my engine Light on it have a code#PO401& code#PO420 how can I fit this problem?
Thursday, May 10th, 2012 AT 2:05 AM

3 Replies

Tiny
PROMECHANIC
  • MECHANIC
  • 536 POSTS
It is likely that your EGR valve is sticking open, then sticking closed. It is not common to have these codes together. You might be able to take the valve off and lubricate it to see if this makes the code go away.
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Thursday, May 10th, 2012 AT 2:07 AM
Tiny
JOE1953
  • MEMBER
  • 619 POSTS
The engine run good. Will a leakage intakegasket make this problem?
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Thursday, May 10th, 2012 AT 2:25 AM
Tiny
PROMECHANIC
  • MECHANIC
  • 536 POSTS
Probably not. If that were the case you would likely only have one of these codes. It is possible I guess though.
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Thursday, May 10th, 2012 AT 2:32 AM

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