TravisC230

Hello, I am new to the forum. My 2006 C230 has been throwing the P2716 code. Which is Y3/8Y4 solenoid. Any body know if this is the blue or black cap solenoid? When I had it apart last I didnt see any issues when ohming out the solenoids. They were all 5.5 ohms. I rigged up a 9v battery to "snap" them to make sure they were working. It seemed like they all did but thats such low power that it wasn't very loud when they did. What is the best way to check these? Anyone ever found the best way? Hoping that its really just one solenoid and not the TCM starting to act up. I really appreciate anyone taking the time to read this!!!