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Check engine light

3586 Views 16 Replies 6 Participants Last post by  vandstra
Hello all.....I was driving yesterday and the light came on. How can I diagnose it myself?
Ps, do I need a code reader?
Thx in advance,
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Instructions for universal Bosch O2 sensor

If anyone wants to save a few bucks and get the universal Bosch sensor you can view instructions here:

If all you need is the wire color reference: (Element>Bosch) Blue>Black, White>Gray, 2 Blacks>2Whites.
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