BMW DTC P1184 – HO2S Sensor Voltage Excursion Electrical (Bank 1 Sensor 1)
DTC P1184 meaning on BMW
The Diagnostic Trouble Code (DTC) P1184 for BMW refers to an issue with the HO2S (Heated Oxygen Sensor) Sensor Voltage Excursion Electrical on Bank 1 Sensor 1. This code indicates that the voltage signal from the oxygen sensor located in the exhaust system before the catalytic converter has exceeded the expected range.
BMW DTC P1184 symptoms
Symptoms of DTC P1184 on a BMW may include:
- Check Engine Light (MIL) illuminated on the dashboard
- Decreased fuel efficiency
- Engine running rough or misfiring
- Reduced engine performance
BMW DTC P1184 causes
Common causes of DTC P1184 on a BMW include:
- Faulty HO2S (Heated Oxygen Sensor)
- Wiring or connector issues in the oxygen sensor circuit
- Exhaust system leaks
- Engine running rich or lean
BMW DTC P1184 seriousness
While DTC P1184 may not cause immediate drivability issues, it is important to address this code promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance and fuel efficiency.
How to diagnose DTC P1184 on BMW
To diagnose DTC P1184 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes and freeze frame data
- Inspect the wiring and connectors related to the Bank 1 Sensor 1 oxygen sensor
- Check for exhaust leaks or other issues in the exhaust system
- Test the HO2S sensor using a multimeter to verify its functionality
How to fix DTC P1184 on BMW
To fix DTC P1184 on a BMW, the following steps may be taken:
- Replace the Bank 1 Sensor 1 HO2S if it is found to be faulty
- Repair any damaged wiring or connectors in the oxygen sensor circuit
- Address any exhaust leaks or other issues in the exhaust system
- Clear the fault codes and perform a test drive to ensure the issue has been resolved
How to erase DTC P1184 on BMW
To erase DTC P1184 on a BMW, the fault codes can be cleared using a diagnostic scanner or code reader. After addressing the underlying issue causing the fault code, clearing the codes will reset the Check Engine Light and allow for monitoring of the vehicle’s performance to ensure the problem has been resolved.
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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