BMW DTC P1104 – Differential Pressure Sensor Intake Manifold Pressure Too Low (Bank 1)
DTC P1104 meaning on BMW
The DTC P1104 on a BMW indicates that the Differential Pressure Sensor has detected that the intake manifold pressure is too low on Bank 1. This sensor is responsible for monitoring the pressure difference between the intake manifold and the atmosphere. When the sensor detects that the pressure is lower than expected, it triggers the P1104 fault code.
BMW DTC P1104 symptoms
Symptoms of the DTC P1104 on a BMW may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Reduced engine performance
- Engine stalling or rough idling
- Decreased fuel efficiency
BMW DTC P1104 causes
The common causes of the DTC P1104 on a BMW include:
- Faulty Differential Pressure Sensor
- Vacuum leaks in the intake system
- Clogged air filter
- Issues with the intake manifold
BMW DTC P1104 seriousness
While the DTC P1104 may not cause immediate harm to the vehicle, it can lead to reduced engine performance and fuel efficiency. Ignoring this fault code can potentially cause further damage to the engine over time.
How to diagnose DTC P1104 on BMW
To diagnose the DTC P1104 on a BMW, you can perform the following steps:
- Use an OBD-II scanner to retrieve the fault code and check for any other related codes
- Inspect the intake manifold and vacuum lines for any signs of damage or leaks
- Test the Differential Pressure Sensor using a multimeter to ensure it is functioning correctly
- Clean or replace the air filter if necessary
How to fix DTC P1104 on BMW
To fix the DTC P1104 on a BMW, you can try the following solutions:
- Replace the faulty Differential Pressure Sensor
- Repair any vacuum leaks in the intake system
- Clean or replace the air filter
- If necessary, repair or replace any damaged components in the intake manifold
How to erase DTC P1104 on BMW
To erase the DTC P1104 on a BMW, you can use an OBD-II scanner to clear the fault code from the vehicle’s computer. Once the code is cleared, you can drive the vehicle and monitor if the code reappears. If the issue has been successfully resolved, the Check Engine Light should turn off.
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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