BMW DTC P0273 – Cylinder 5 Injector ‘A’ Circuit Low
DTC P0273 meaning on BMW
The Diagnostic Trouble Code (DTC) P0273 for BMW indicates an issue with the Cylinder 5 Injector ‘A’ Circuit being detected as low. This means that the Engine Control Module (ECM) has detected a lower than expected voltage signal from the fuel injector circuit for cylinder 5.
BMW DTC P0273 symptoms
Symptoms of DTC P0273 on a BMW may include:
- Engine misfires
- Rough idling
- Decreased engine performance
- Check Engine Light (CEL) illuminated
BMW DTC P0273 causes
Common causes of DTC P0273 on a BMW include:
- Faulty fuel injector for cylinder 5
- Wiring or connector issues in the injector circuit
- ECM software or hardware problems
- Fuel delivery issues
BMW DTC P0273 seriousness
Ignoring DTC P0273 on a BMW can lead to potential engine performance issues, increased fuel consumption, and possible damage to the catalytic converter. It is recommended to address this issue promptly to prevent further complications.
How to diagnose DTC P0273 on BMW
To diagnose DTC P0273 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the wiring and connectors related to the fuel injector for cylinder 5
- Test the fuel injector for proper operation
- Check fuel pressure and delivery to the injector
- Perform a visual inspection of the injector circuit components
How to fix DTC P0273 on BMW
To fix DTC P0273 on a BMW, you can try the following:
- Replace the faulty fuel injector for cylinder 5
- Repair any damaged wiring or connectors in the injector circuit
- Update the ECM software if necessary
- Ensure proper fuel delivery and pressure
How to erase DTC P0273 on BMW
To erase DTC P0273 on a BMW, you can use a diagnostic scanner to clear the fault code after addressing the underlying issue. Once the problem has been fixed, you can reset the ECM and erase the DTC 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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