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Old 01-12-2006   #1 (permalink)
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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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Old 01-12-2006   #2 (permalink)
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clean the Mas Air sensor?
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Old 01-12-2006   #3 (permalink)
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Is the car running poorly? Bad gas mileage?
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Old 01-12-2006   #4 (permalink)
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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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Old 01-12-2006   #5 (permalink)
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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 . Of course it was running horribly, stuttering and what not, getting 10 MPG.
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Old 01-12-2006   #6 (permalink)
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Quote:
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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.
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Old 01-12-2006   #7 (permalink)
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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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Old 01-12-2006   #8 (permalink)
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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
did you disconnect the battery?
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Old 01-12-2006   #9 (permalink)
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No I erased the codes with an OBD II
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Old 01-12-2006   #10 (permalink)
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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.
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