BMW DTC P2149 – Fuel Injector Group ‘B’ Supply Voltage Circuit/Open
DTC P2149 meaning on BMW
DTC P2149 on a BMW indicates a fault in the Fuel Injector Group ‘B’ Supply Voltage Circuit, specifically an open circuit. This means that the Engine Control Module (ECM) is not receiving the expected voltage signal from the fuel injectors in group ‘B’.
BMW DTC P2149 symptoms
Symptoms of DTC P2149 on a BMW may include engine misfires, rough idling, decreased fuel efficiency, and potentially a noticeable decrease in engine performance. The Check Engine Light may also be illuminated on the dashboard.
BMW DTC P2149 causes
The common causes of DTC P2149 on a BMW include a faulty fuel injector in group ‘B’, a wiring issue in the fuel injector circuit, a poor electrical connection, or a problem with the Engine Control Module (ECM).
BMW DTC P2149 seriousness
DTC P2149 should be addressed promptly as it can lead to poor engine performance, reduced fuel efficiency, and potential long-term damage to the engine if left unresolved. Ignoring this fault may result in further complications and costly repairs.
How to diagnose DTC P2149 on BMW
To diagnose DTC P2149 on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault codes stored in the ECM. They would then inspect the fuel injectors in group ‘B’, check the wiring and connectors for any visible damage, and perform electrical tests to identify the source of the open circuit.
How to fix DTC P2149 on BMW
Fixing DTC P2149 on a BMW may involve replacing the faulty fuel injector in group ‘B’, repairing any damaged wiring or connectors, ensuring proper electrical connections, or replacing the Engine Control Module (ECM) if necessary. It is recommended to follow the manufacturer’s diagnostic and repair procedures to address this issue effectively.
How to erase DTC P2149 on BMW
Once the underlying issue causing DTC P2149 on a BMW has been resolved, the fault codes can be cleared using a diagnostic scanner. By clearing the codes, the Check Engine Light should turn off, indicating that the fault has been addressed. It is important to verify that the issue has been fixed before clearing the fault codes.
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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