hello guys i got a 97 audi a4 2.8 v6. i went to go get my car smog and they told me that theres a problem thats why it wont pass smog. here's the code
P0116- Engine coolant temp (link me a DIY please)
p0156- Sensor Circuit Malfunction (Bank 2, Sensor 2) where is this sensor is it the one on the left or right by cat converter?


please help me my registration is going to due 3 days from now. Thanks a lot