BMW DTC P119B – Manifold Absolute Presssure Sensor Circuit Low (Bank 1)
DTC P119B meaning on BMW
DTC P119B indicates a low circuit condition in the Manifold Absolute Pressure (MAP) sensor for Bank 1 in a BMW vehicle. The Engine Control Module (ECM) detects that the signal voltage from the MAP sensor is below the expected range, suggesting a potential issue with the sensor or its circuit.
BMW DTC P119B symptoms
Symptoms of DTC P119B in a BMW may include:
- Check Engine Light (MIL) illuminated
- Reduced engine performance
- Potential rough idling or stalling
- Decreased fuel efficiency
BMW DTC P119B causes
Common causes of DTC P119B in a BMW include:
- Defective MAP sensor
- Wiring or connector issues in the MAP sensor circuit
- Vacuum leaks affecting MAP sensor readings
- ECM software or hardware problems
BMW DTC P119B seriousness
While DTC P119B may not cause immediate drivability issues, it can lead to reduced engine performance and fuel efficiency if left unresolved. Ignoring this fault code may result in further damage to engine components over time.
How to diagnose DTC P119B on BMW
To diagnose DTC P119B on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the MAP sensor and its wiring for any visible damage or corrosion
- Check for vacuum leaks that could affect MAP sensor readings
- Test the MAP sensor using a multimeter to verify its functionality
- Verify the ECM software for any updates or reprogramming needed
How to fix DTC P119B on BMW
To fix DTC P119B on a BMW, you can try the following solutions:
- Replace the faulty MAP sensor with a new one
- Repair any damaged wiring or connectors in the MAP sensor circuit
- Address any vacuum leaks in the intake system
- Update or reprogram the ECM software as necessary
How to erase DTC P119B on BMW
To erase DTC P119B on a BMW, you can use a diagnostic scanner to clear the fault code from the ECM’s memory. After fixing the underlying issue causing the fault code, you can reset the ECM and drive the vehicle to see if the code reappears.
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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