Chevrolet Forum - Chevy Enthusiasts Forums - 98 Chevy Suburban code P0430 and P0440

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JJL	Feb 15, 2026 9:50 PM

98 Chevy Suburban code P0430 and P0440

Got 2 different codes, the P0430 yesterday and another code P0440 today! Help!

JJL	Feb 16, 2026 9:13 PM

I may have found the problem. Broken line.

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