BMW DTC P0204 – Cylinder 4 Injector ‘A’ Circuit/Open
DTC P0204 meaning on BMW
The Diagnostic Trouble Code (DTC) P0204 for BMW indicates an issue with the Cylinder 4 Injector ‘A’ Circuit/Open. This means that the Engine Control Module (ECM) has detected an open circuit or a fault in the electrical connection related to the fuel injector for cylinder 4.
BMW DTC P0204 symptoms
Symptoms of DTC P0204 on a BMW may include:
- Engine misfires
- Decreased engine performance
- Engine stalling
- Check Engine Light (CEL) illuminated
BMW DTC P0204 causes
Common causes of DTC P0204 on a BMW include:
- Faulty fuel injector for cylinder 4
- Open or short circuit in the wiring harness related to the injector
- Faulty Engine Control Module (ECM)
- Poor electrical connection
BMW DTC P0204 seriousness
Ignoring DTC P0204 on a BMW can lead to potential engine performance issues, increased fuel consumption, and possible damage to the catalytic converter. It is important to address this issue promptly to prevent further damage to the vehicle.
How to diagnose DTC P0204 on BMW
To diagnose DTC P0204 on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes and confirm P0204.
- Inspect the wiring harness and connector related to the cylinder 4 injector for any visible damage or corrosion.
- Test the resistance of the injector and compare it to specifications.
- Check for power and ground at the injector connector.
How to fix DTC P0204 on BMW
To fix DTC P0204 on a BMW, you can follow these steps:
- Replace the faulty fuel injector for cylinder 4.
- Repair any open or short circuits in the wiring harness.
- Ensure proper electrical connections and secure any loose connections.
- If necessary, replace the Engine Control Module (ECM).
How to erase DTC P0204 on BMW
To erase DTC P0204 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ECM. After addressing the underlying issue causing the fault code, clearing the code will reset the Check Engine Light and monitor the system for any new faults.
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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