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post #1 of 10 (permalink) Old 01-12-2006 Thread Starter
 
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Angry Check Engine Light ON

The codes are P401 & P402 on the OBD reading and they say insufficient flow. I already changed the EGR valve. What else can I do? Please help if you can. Its a 96

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post #2 of 10 (permalink) Old 01-12-2006
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clean the Mas Air sensor?


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post #3 of 10 (permalink) Old 01-12-2006
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Is the car running poorly? Bad gas mileage?
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post #4 of 10 (permalink) Old 01-12-2006 Thread Starter
 
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Realy?

Would a dirty MAF really make the code come up EGR flow insufficient? Is it just a guess or how sure are you.
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post #5 of 10 (permalink) Old 01-12-2006
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You may want to replace the DPFE sensor. Mine went bad on my Windstar and the $50 replacement from Advance Auto Parts fixed it right up :smoke: . Of course it was running horribly, stuttering and what not, getting 10 MPG.
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post #6 of 10 (permalink) Old 01-12-2006
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Quote:
Originally Posted by rtrejo77
Would a dirty MAF really make the code come up EGR flow insufficient? Is it just a guess or how sure are you.
I don't know the codes. a MAF shouldn't cause problems with the EGR. If it's EGR flow, then it's a sticky valve.

Woe to him who builds his palace by unrighteousness,his upper rooms by injustice,making his countrymen work for nothing...Does it make you a king to have more and more cedar?Did not your father have food and drink?He did what was right and just,so all went well with him. He defended the cause of the poor and needy,and so all went well...But your eyes and your heart are set only on dishonest gain,on shedding innocent blood and on oppression and extortion. Jer 22:13, 15-17
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post #7 of 10 (permalink) Old 01-12-2006 Thread Starter
 
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The car runns fine and I just had the EGR valve replaced a day ago because I thought it might be a sticky valve. It used to read both insufficient and exessive flow but now with the new valve it just reads insufficient
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post #8 of 10 (permalink) Old 01-12-2006
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Quote:
Originally Posted by rtrejo77
The car runns fine and I just had the EGR valve replaced a day ago because I thought it might be a sticky valve. It used to read both insufficient and exessive flow but now with the new valve it just reads insufficient
did you disconnect the battery?

Woe to him who builds his palace by unrighteousness,his upper rooms by injustice,making his countrymen work for nothing...Does it make you a king to have more and more cedar?Did not your father have food and drink?He did what was right and just,so all went well with him. He defended the cause of the poor and needy,and so all went well...But your eyes and your heart are set only on dishonest gain,on shedding innocent blood and on oppression and extortion. Jer 22:13, 15-17
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post #9 of 10 (permalink) Old 01-12-2006 Thread Starter
 
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No I erased the codes with an OBD II
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Quote:
Originally Posted by rtrejo77
No I erased the codes with an OBD II
Before you go any further, disconnect the battery for a few minutes and reconnect to see if it comes up again.

Woe to him who builds his palace by unrighteousness,his upper rooms by injustice,making his countrymen work for nothing...Does it make you a king to have more and more cedar?Did not your father have food and drink?He did what was right and just,so all went well with him. He defended the cause of the poor and needy,and so all went well...But your eyes and your heart are set only on dishonest gain,on shedding innocent blood and on oppression and extortion. Jer 22:13, 15-17
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