BMW DTC P122B – Barometric Pressure Sensor ‘B’ Afterrunning Diagnosis Pressure Too High
DTC P122B meaning on BMW
The DTC P122B on a BMW indicates that the Barometric Pressure Sensor ‘B’ Afterrunning Diagnosis Pressure is too high. This means that the sensor is detecting a pressure reading that exceeds the specified parameters after the engine has been running.
BMW DTC P122B symptoms
Symptoms of the DTC P122B on a BMW may include:
- Check Engine Light illuminated
- Reduced engine performance
- Engine stalling or rough idling
- Decreased fuel efficiency
BMW DTC P122B causes
Common causes of the DTC P122B on a BMW include:
- Faulty Barometric Pressure Sensor ‘B’
- Wiring or connector issues in the sensor circuit
- Problems with the engine’s air intake system
- Issues with the engine control module (ECM)
BMW DTC P122B seriousness
The DTC P122B on a BMW should not be ignored as it can lead to potential engine performance issues and decreased fuel efficiency. It is recommended to address this issue promptly to prevent further damage to the vehicle.
How to diagnose DTC P122B on BMW
To diagnose the DTC P122B on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the Barometric Pressure Sensor ‘B’ for any visible damage or signs of wear
- Check the wiring and connectors in the sensor circuit for any loose connections or corrosion
- Perform a pressure test to verify the sensor readings
How to fix DTC P122B on BMW
To fix the DTC P122B on a BMW, you can try the following solutions:
- Replace the Barometric Pressure Sensor ‘B’ if it is found to be faulty
- Repair any damaged wiring or connectors in the sensor circuit
- Clean or replace the air intake system components if necessary
- Reset the engine control module (ECM) to clear the fault code
How to erase DTC P122B on BMW
To erase the DTC P122B on a BMW, you can use a diagnostic scanner to clear the fault code from the engine control module (ECM). Once the code is cleared, you can drive the vehicle and monitor for any recurrence of the issue.
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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