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Q: Replace knock sensor but check engine light stays on. Raw gas smell in cabin on 2000 Infiniti Q45

Codes said to replace knock sensor but check engine light stays on.
Also, there was the smell of raw gas in the cabin and on the left side under hood but no sign of leak.
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some trouble codes stored in the engine,
you shoule use a code scanner clear the fault code,
this tool can help you.
http://www.chinasinoy.com/wholesale/code-reader-scanner-tool-obd-ii-eobd-english-spanish-free-shipping-445.html
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