Jerry Donnell
Junior Member
- Joined
- May 2, 2020
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I have a ‘11 GT (5.0, 108K miles) with the check engine light on. Codes were for bad O2 sensors bank 1 sensor 2 and bank 2 sensor 1, I have changed both sensors. Now it is telling me that bank 2 sensor 1 has a low voltage code and the check engine light is on again. I took the upstream sensor back and installed a new one today (exchange because it is only two months old). Issue now is if I start it cold the check engine light comes on, but if it warms up, I clear the code, I can drive it and the light stays off. As soon as it cools off or cold start it will throw the code and the check engine light comes back. The car runs and idles normally no change in gas mileage or smoke from the exhaust. I’m at wits end trying to figure this out. Any comments or help would be welcome.