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possibility of poor electrical connection or failed damper clutch solenoid.
Possible excessive rich or lean air/fuel ratio, ignition system malfunction, or vacuum leak
possible faulty MAF or TPS
Approximately how much would these cost to fix?

Vehicle: 2002, hyundai, sonata, v-6

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P0740- you can try to replace the transmission fluid and see if that fixes the problem, its worth a try.

P0102- you can replace the air filter if it has not been replaced in the last 15k miles. You can try to cleaner the Mass air flow sensor with mass air flow sensor cleaner. You can also try to clean the throttle body with throttle body cleaner. 

P1167- try to fix the other codes first and it might get rid of the problem. Also use 91 octane fuel from Shell

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