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I have a 1999 Hyundai Sonota. The check engine light ...

Sent to Car Experts May 9 2006 at 7:18 AM
   

I have a 1999 Hyundai Sonota. The check engine light has been on showing P401, Insufficient EGR Valve flow. My mechanic has changed the MAP sensor and EGR valve. C.E.L. continues to come on and alternates between insufficinet and excessive EGR valve flow. He reports the solenoid is good, changed the vacuum hoses, but light continues to come on after a few miles. ANy thoughts on what it could be?

Thanks,
Tim

Customer (name blocked for privacy)
Status:  Closed   Value: $15
Answer
May 9 2006 at 7:54 AM (36 minutes later)
         
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Steve7654 -- Auto Service Technician -- 99% Positive Feedback on 1792 Car Accepts
27 yrs ASE L1 Master Technician, Service manager
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