BMW DTC P01F4 – O2 Sensor Circuit Slow Response Bank 1 Sensor 4
DTC P01F4 meaning on BMW
DTC P01F4 on a BMW indicates an issue with the O2 sensor circuit slow response for Bank 1 Sensor 4. This means that the oxygen sensor located in the fourth position on the first bank of the engine is not responding as quickly as expected by the engine control module (ECM).
BMW DTC P01F4 symptoms
Symptoms of DTC P01F4 on a BMW may include poor fuel economy, rough idling, hesitation during acceleration, and an illuminated check engine light on the dashboard.
BMW DTC P01F4 causes
The causes of DTC P01F4 on a BMW can vary, but common reasons include a faulty oxygen sensor, wiring issues in the O2 sensor circuit, exhaust leaks, or a problem with the ECM.
BMW DTC P01F4 seriousness
While DTC P01F4 may not cause immediate drivability issues, it can lead to decreased fuel efficiency and potentially harm the engine over time if left unresolved. It is recommended to address this issue promptly.
How to diagnose DTC P01F4 on BMW
To diagnose DTC P01F4 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 and its wiring. They may also conduct tests to check the sensor’s response time and voltage output.
How to fix DTC P01F4 on BMW
Fixing DTC P01F4 on a BMW usually involves replacing the faulty O2 sensor in Bank 1 Sensor 4. Additionally, any damaged wiring should be repaired, and the system should be retested to ensure the issue has been resolved.
How to erase DTC P01F4 on BMW
Once the underlying issue causing DTC P01F4 on a BMW has been fixed, the fault code can be cleared using a diagnostic scanner. This will reset the check engine light and allow the 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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