So I had the knock sensor code and p1456 code pop up I replaced the sensor and harness with a new one from eBay. And also replaced the evap solenoid sensor on the charcoal canister but the codes reappeared and every time both of them pop up at the same time so I’m not sure if a vacuum leak can cause a knock code to ? Any insights would be helpful

 

remove the hot garbage sensor from amazon and install a hitachi or bosch sensor from a trusted seller (generally NOT amazon)

 

Go to the Factory Service Manual and follow the detailed troubleshooting procedure for the P1456 Code