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What do these codes mean? ECU#00H, ECU#60H, ECU#40H

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These codes were on my friends machine when he connected it. The Service Engine Soon light is on.

Vehicle: 2008 Chevrolet Truck 1500 2WD 5.3L V8

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There are no codes like that, the OBD-II reader you are using is not compatible with your car, try to use a different one.

you should get a code like P#### (P0060) and so on.

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