BMW DTC P1512 – DISA (Differentiated Intake Manifold) Control Circuit Low
DTC P1512 meaning on BMW
The DTC P1512 code on a BMW indicates an issue with the DISA (Differentiated Intake Manifold) control circuit being detected as low. The DISA system is responsible for adjusting the length of the intake manifold runners to optimize engine performance at different RPM ranges. A low signal in the control circuit can lead to improper operation of the DISA system.
BMW DTC P1512 symptoms
Symptoms of a DTC P1512 on a BMW may include rough idling, decreased engine performance, reduced fuel efficiency, and potentially an illuminated check engine light on the dashboard.
BMW DTC P1512 causes
The causes of a DTC P1512 on a BMW can vary, but common reasons include a faulty DISA valve, damaged wiring or connectors in the control circuit, or issues with the DISA control module.
BMW DTC P1512 seriousness
While a DTC P1512 may not cause immediate drivability issues, it can lead to reduced engine performance and efficiency over time if left unresolved. It is recommended to address this issue promptly to prevent further complications.
How to diagnose DTC P1512 on BMW
To diagnose a DTC P1512 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and then perform a visual inspection of the DISA valve, wiring, and connectors. Testing the DISA valve’s operation and checking for any loose or damaged connections in the control circuit are essential steps in the diagnostic process.
How to fix DTC P1512 on BMW
Fixing a DTC P1512 on a BMW may involve replacing the faulty DISA valve, repairing or replacing damaged wiring or connectors in the control circuit, or addressing any issues with the DISA control module. It is recommended to follow the manufacturer’s repair procedures and use genuine parts to ensure proper functionality.
How to erase DTC P1512 on BMW
Once the underlying issue causing the DTC P1512 on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. By clearing the code, the check engine light should turn off, indicating that the problem has been addressed. It is important to ensure that the repair has been successful before clearing the fault code.
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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