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Discussion Starter · #1 ·
Hi,
My check engine light won't shut off. I changed the EGR valve, O2 sensor upstream and downstream, spark plugs, spark plug wires - still won't shut off. Any suggestions because it won't pass emissions.

Thanks!
 

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Year - Make - Model - Engine - Mileage please

As atoman noted, pull the OBD codes so there is a starting point for diagnosing.

Were OEM/NTK O2 sensors used? Denso has been known to work but no Bosch (hit or miss proposition).
 
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