BMW DTC P1108 – Manifold Air Pressure Too Low at Full Load for Low Engine Speed
DTC P1108 meaning on BMW
DTC P1108 on a BMW indicates that the Manifold Air Pressure is too low at full load for low engine speed. This means that the engine control module (ECM) has detected a discrepancy between the expected manifold air pressure and the actual pressure during high load conditions at low engine speeds.
BMW DTC P1108 symptoms
Symptoms of DTC P1108 on a BMW may include:
- Reduced engine power
- Poor acceleration
- Engine hesitation
- Check Engine Light (CEL) illuminated
BMW DTC P1108 causes
Possible causes of DTC P1108 on a BMW include:
- Malfunctioning Manifold Absolute Pressure (MAP) sensor
- Intake air leaks
- Restricted air filter
- Issues with the turbocharger or intercooler
BMW DTC P1108 seriousness
DTC P1108 should be addressed promptly as it can lead to poor engine performance and reduced fuel efficiency. Ignoring this fault may result in further damage to engine components over time.
How to diagnose DTC P1108 on BMW
To diagnose DTC P1108 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 signs of damage or corrosion
- Check for any intake air leaks or restrictions
- Inspect the air filter and replace if necessary
- Perform a boost pressure test to check the turbocharger and intercooler
How to fix DTC P1108 on BMW
To fix DTC P1108 on a BMW, you can try the following solutions:
- Replace the faulty MAP sensor
- Repair any intake air leaks
- Clean or replace the air filter
- Inspect and repair any issues with the turbocharger or intercooler
How to erase DTC P1108 on BMW
To erase DTC P1108 on a BMW, you can use a diagnostic scanner to clear the fault code from the ECM’s memory. After fixing the underlying issue, you can reset the code to turn off the Check Engine Light.
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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