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Will a code 1133 and 442 indicate a gas cap leak?

Vehicle: 2000 Chevy Malibu

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Hi there,

The P0442 can be caused by a faulty seal on the gas cap, the P1133 is a code for the O2 sensor, bank 1 sensor 1 heater circuit. This needs to be checked to determine the issue although normally it's a problem with the O2 sensor.

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asked Jun 16, 2018 by Tim

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