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2006 Cadillac DTS 4.6L NorthStar with engine code P2A03. How do I fix the problem?

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I have a P2A03 engine code popping up on my 2006 Cadillac DTS 4.6L NorthStar. How do I fix the problem?

Vehicle: 2006 Cadillac DTS 4.6L NorthStar

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Best answer

bank 2 sensor 1 air to fuel ratio sensor might be bad.

see picture below for location, the arrow shows the front of the engine.

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P2A03 Cadillac Code - O2 Sensor Performance Bank 2 Sensor 1
Read more: https://www.autocodes.com/p2a03_cadillac.html

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