Chevy Engine Code P0420

Florian Rogahn 22 Aug 2023

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I have engine code p018c, How can I fix this?

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I have engine code p018c, how can i fix this?

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My engine light came on reading code p0171 and secondary dtc p0420 myCheck engine light is on and codes p0420 and p0430 Chevy code image0 cruze p0420P0043 code: ho2s heater control circuit low (bank 1 sensor 3).

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P0420 Chevy Silverado OBDII Code Diagnosis and Explanation | Drivetrain

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