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Between these two codes there are a lot of different things for these codes. How do I know which one is my problem. From these codes

Vehicle: 2000 Chevrolet s10 pickup 4.3 lt

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P0410 Secondary air injection system malfunction

P1870 Excessive TCC (Transmission toque convertor) slipping

These are 2 seperate code condtion, P0410 is for the secondary air injection this is used in cold start up to rapidly warm up the catalytic convertor this is for emission control . P1870 transmission componenet slipping Both these code does not produce a noticeable drivability condition

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