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Don't know if this has been posted before but,
Here is pretty good link that covers many sensor issues, EGR diagnostics.
Good for a noob and good for reference.
All in PDF format.
Click on the Diagnostics tab at the top.
Test
Here is pretty good link that covers many sensor issues, EGR diagnostics.
Good for a noob and good for reference.
All in PDF format.
Click on the Diagnostics tab at the top.
Test