why does the code come back on ?

Question

it is a 2004 chevy astro van with 4.3 LT , I changed the sensor but the code comes back on , where do I look next, thank you

Answer 1

Hi there,

If replacing the O2 sensor hasn't solved the issue, it's likely a wiring problem. Here is some info for you.

P0059 CHEVROLET - HO2S Heater Resistance Bank 2 Sensor 1

Read more: https://www.autocodes.com/p0059_chevrolet.html