The 2000 Monte Carlo programming should NOT have this diagnostic test active. GM did not add the post-cat and post-cat O2 diagnostics that cause these rich running issues until 2001 model year (programming).Originally Posted by Pure2sin
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08-25-2011
The 2000 Monte Carlo programming should NOT have this diagnostic test active. GM did not add the post-cat and post-cat O2 diagnostics that cause these rich running issues until 2001 model year (programming).
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