BMW DTC P1094 – O2 Sensor Circuit Slow Response in Rich Control Range (Bank 2 Sensor 1)
DTC P1094 meaning on BMW
DTC P1094 on a BMW indicates an issue with the O2 sensor circuit in the rich control range for Bank 2 Sensor 1. This means that the oxygen sensor located before the catalytic converter on the bank 2 side of the engine is responding slowly to changes in the air-fuel mixture when the engine is running rich.
BMW DTC P1094 symptoms
Symptoms of DTC P1094 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 P1094 causes
The slow response of the O2 sensor in the rich control range for Bank 2 Sensor 1 can be caused by a variety of factors, including a faulty oxygen sensor, wiring issues, exhaust leaks, or a problem with the engine’s air-fuel mixture.
BMW DTC P1094 seriousness
While DTC P1094 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 P1094 on BMW
To diagnose DTC P1094 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 compare it to specifications.
How to fix DTC P1094 on BMW
Fixing DTC P1094 on a BMW usually involves replacing the Bank 2 Sensor 1 oxygen sensor. It is important to use an OEM or high-quality replacement sensor to ensure proper functionality. Additionally, any wiring issues or exhaust leaks should be addressed to prevent future sensor failures.
How to erase DTC P1094 on BMW
After fixing the underlying issue causing DTC P1094 on a BMW, the fault code can be cleared using a diagnostic scanner. This will reset the check engine light and allow the vehicle’s onboard computer 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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