BMW DTC P1114 – O2 Sensor Signal Circuit Slow Switching from Lean to Rich (Bank 2 Sensor 1)
DTC P1114 meaning on BMW
DTC P1114 on a BMW indicates an issue with the O2 sensor signal circuit slow switching from lean to rich for Bank 2 Sensor 1. This means that the oxygen sensor located before the catalytic converter on the second bank of cylinders is not switching between lean (high oxygen content) and rich (low oxygen content) conditions as quickly as expected.
BMW DTC P1114 symptoms
Symptoms of DTC P1114 on a BMW may include poor fuel economy, rough idling, hesitation during acceleration, and potentially an illuminated Check Engine Light on the dashboard.
BMW DTC P1114 causes
The causes of DTC P1114 on a BMW can vary, but common reasons include a faulty oxygen sensor, wiring issues in the sensor circuit, vacuum leaks, or problems with the engine’s air-fuel mixture.
BMW DTC P1114 seriousness
While DTC P1114 may not cause immediate drivability issues, it can lead to decreased fuel efficiency and increased emissions. Ignoring this fault code can potentially cause damage to the catalytic converter over time.
How to diagnose DTC P1114 on BMW
To diagnose DTC P1114 on a BMW, a mechanic would typically use a scan tool to retrieve the fault code and then perform a visual inspection of the oxygen sensor and its wiring. They may also conduct tests to check the sensor’s response to changes in the air-fuel mixture.
How to fix DTC P1114 on BMW
Fixing DTC P1114 on a BMW often involves replacing the faulty oxygen sensor, repairing any damaged wiring, fixing vacuum leaks, or addressing issues with the engine’s air-fuel mixture. Once the underlying problem is resolved, the fault code should be cleared from the vehicle’s memory.
How to erase DTC P1114 on BMW
To erase DTC P1114 on a BMW, a mechanic can use a scan tool to clear the fault code from the vehicle’s computer. Once the repair has been completed and the issue resolved, clearing the code will reset the Check Engine Light and ensure that the fault does not reoccur.
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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