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2004 Cadillac Seville SLS Question: I went through Echeck & failed the following codes came up

 

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7374 ram, Stow, OH, February 06, 2013, 11:08
 Rookie

po171-po174-po300-po410-po741 & check engine light does not work.I bought another PCM.

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    Greg's Orange Auto (13428 Answers) , Orange, CA - (714) 361-9386
    globalhelper February 06, 2013, 12:14
     Master

    you have lean codes of 171 and 174 both banks misfire codes po300,emisssion issues with air injection po410 and trans codes po741

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    7374 ram, February 06, 2013, 13:21
     Rookie

    How do trouble shoot the problems

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    globalhelper, February 06, 2013, 18:28
     Master

    this may be beyond your capabilities,sorry not trying to be harsh. i rec you seek the help of your mech to diag every issue.alot of people get some info and just start replacing parts that are not needed,so to prevent wasting $ get proper diag

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