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Joel, Auto technician
Category: Chevy
Satisfied Customers: 1603
Experience:  GM, ASE Certified Technician. Chevy, Buick, Pontiac, Olds. Over 18 Years experience and growing.
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I am getting a OBD code of p1133. What needs to be replaced

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I am getting a OBD code of p1133. What needs to be replaced? Its on a 2005 colorado truck w/5 cylinder w/ AT.

Hello and welcome.

This code is for the bank1 sensor1 oqygen sensor insufficient switching.

If your scanner shows live sensor data, you would be able to see the reading are slow or not moving much at all.

That sensor is the most likely cause.

It is located in the exhaust manifold, accessed form under the hood.


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