This is the “fine” description of the trouble code and for example, P0420 means there is an issue at Bank 1, while the code P0421 means the issue is at bank 2. While the engine codes are quite logical, it’s very difficult to remember all of these OBD codes. I’ve created a ...
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[CDATA[ Hello all,<br><br>When I read a code such as "P0304" I am seeing references that the "4" refers to the firing sequence as opposed to the physical position of cylinder.<br><br>Example: 2007 HHR 2.2ltr, firing sequence is 1-3-4-2. P0304 is pointing to cylinder #2.<br...
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This is the “fine” description of the trouble code and for example, P0420 means there is an issue at Bank 1, while the code P0421 means the issue is at bank 2. While the engine codes are quite logical, it’s very difficult to remember all of these OBD codes. I’ve created a ...