BMW DTC P0291 – Cylinder 11 Injector ‘A’ Circuit Low
DTC P0291 meaning on BMW
DTC P0291 for BMW refers to an issue with the Cylinder 11 Injector ‘A’ Circuit being detected as low. This means that the fuel injector circuit for cylinder 11 is experiencing a lower than expected voltage or resistance, which can lead to improper fuel delivery to the engine.
BMW DTC P0291 symptoms
Symptoms of DTC P0291 on a BMW may include rough idling, misfires, decreased engine performance, poor fuel efficiency, and potentially an illuminated check engine light on the dashboard.
BMW DTC P0291 causes
The causes of DTC P0291 on a BMW can vary, but common reasons include a faulty fuel injector for cylinder 11, wiring issues in the injector circuit, a poor connection, or a problem with the Engine Control Module (ECM).
BMW DTC P0291 seriousness
DTC P0291 should be taken seriously as it can lead to engine performance issues and potentially cause further damage if left unresolved. It is recommended to address this issue promptly to prevent any long-term consequences.
How to diagnose DTC P0291 on BMW
To diagnose DTC P0291 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and then perform a thorough inspection of the fuel injector for cylinder 11, check the wiring and connections in the injector circuit, and test the ECM for any faults.
How to fix DTC P0291 on BMW
Fixing DTC P0291 on a BMW may involve replacing the faulty fuel injector for cylinder 11, repairing any damaged wiring or connections in the injector circuit, or addressing any issues with the ECM. It is recommended to follow the manufacturer’s repair procedures for a proper fix.
How to erase DTC P0291 on BMW
To erase DTC P0291 on a BMW, a mechanic can use a diagnostic scanner to clear the fault code after the underlying issue has been fixed. This will reset the check engine light and allow for a fresh monitoring of the system to ensure the problem has been resolved.
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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