CARWATCH
P0155 Error on BMW
What it means and how to fix it
🚨 Fault Description (P0155)
The DTC code P0155 in a BMW vehicle is a sign that the onboard computer has registered the following anomaly:
"O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1)"
Although this is a standardized OBD2 code, the symptoms and the location of the faulty sensor can vary depending on the exact model of your BMW (year, engine type, etc).
Other frequent faults detected in BMW:
Get an Exact AI Diagnosis for your BMW
Instead of changing parts blindly, use the CarWatch AI assistant. Scan your BMW's sensors in real-time and find out the root cause of the P0155 fault before going to the shop.
👉 Diagnose my BMW for FreeRecommended OBD2 Scanner for BMW
To clear the engine light and read the P0155 code from your phone, you need an OBD2 adapter compatible with the BMW ECU.
🛒 View Compatible Scanner on Amazon