Old 02-26-02, 08:23 PM
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Question trouble-codes

I was looking at a chevy fuel injection book. In the section about trouble-codes, it said if several codes are listed, to start with the lowest numbered code unless there is a fifty,s code. I always started with the first code that popped up. Why would you start with the lowest numbered code? which way is right? thanks
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Old 02-27-02, 07:27 AM
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You start by checking the basics .

All of the codes may be interrelated and one problem might cause all three.

A vacuum leak could cause you to think you have a bad MAP sensor, a bad TPS, a bad this, a bad that.

Check all mechanical basics and tune up items first. If any faults are found, start there. If the vehicle has not seen maintenance in a while, start there.

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