Kman
Full Access Member
My Tahoe has roughly 160k miles now. Runs great. Noticed the SES light on so I checked the codes. P0420 and P0420P.
I replaced my rear O2 sensors 20k miles ago with Bosch #13474. I wasn't throwing codes at the time but I figured I should replace them. I have a feeling these rear O2 sensors are causing the P0420 codes. Am I crazy?
What brand and model number O2 sensors should I try? Any info would be great.
I replaced my rear O2 sensors 20k miles ago with Bosch #13474. I wasn't throwing codes at the time but I figured I should replace them. I have a feeling these rear O2 sensors are causing the P0420 codes. Am I crazy?
What brand and model number O2 sensors should I try? Any info would be great.
