If the Check Engine light of your BMW is on and the scanner shows the P0334 code, it means the ECU has detected the following problem:
"Knock Sensor 2 Circuit High Input (Bank 2)"
Despite being a generic fault, how it affects performance and where the physical problem is located changes a lot depending on the specific BMW model you drive.
Find out if you can keep driving or if you urgently need to stop. Connect an onboard reader and let CarWatch decipher exactly what's wrong with your BMW.
👉 Diagnose my BMW for FreeTo clear the engine light and read the P0334 code from your phone, you need an OBD2 adapter compatible with the BMW ECU.
🛒 View Compatible Scanner on Amazon