BMW DTC P3015 – O2 Sensor WRAF-IC Supply Voltage Too Low (Bank 2 Sensor 1)
DTC P3015 meaning on BMW
DTC P3015 on a BMW indicates that the O2 sensor for the WRAF-IC (Wide Range Air Fuel Ionization Current) supply voltage is too low. This sensor is located on Bank 2 Sensor 1 of the vehicle.
BMW DTC P3015 symptoms
Symptoms of DTC P3015 on a BMW may include poor fuel economy, rough idling, engine misfires, and potentially an illuminated check engine light on the dashboard.
BMW DTC P3015 causes
The low supply voltage to the O2 sensor on Bank 2 Sensor 1 can be caused by issues such as a faulty O2 sensor, damaged wiring or connectors, a blown fuse, or a problem with the engine control module (ECM).
BMW DTC P3015 seriousness
While DTC P3015 may not cause immediate drivability issues, it can lead to poor engine performance and increased emissions. Ignoring this fault code can potentially cause damage to the catalytic converter over time.
How to diagnose DTC P3015 on BMW
To diagnose DTC P3015 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and then perform a visual inspection of the O2 sensor, wiring, and connectors. Testing the sensor’s voltage and resistance may also be necessary to pinpoint the issue accurately.
How to fix DTC P3015 on BMW
Fixing DTC P3015 on a BMW involves identifying and addressing the root cause of the low supply voltage to the O2 sensor. This may include replacing the faulty sensor, repairing damaged wiring or connectors, checking and replacing fuses if necessary, or reprogramming the ECM if it is found to be the culprit.
How to erase DTC P3015 on BMW
Once the underlying issue causing DTC P3015 has been resolved, the fault code can be cleared using a diagnostic scanner. This will reset the check engine light and allow the vehicle’s ECM to monitor the system for any new faults.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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