Check engine light, code 28, replaced sensors but still have CEL
 

Recently had a check engine light, pulled codes 28 and 41, which I've read are for the main O2 sensor and TPS respectively. I just replaced both of the O2 sensors on the front (the ones behind the wheels) but still getting code 28 (haven't touched the TPS and that code 41 is no longer showing up). Anything else I should check, or did I replace the wrong sensors, or what? Please help! Thanks in advance