BMW DTC P2056 – Reductant Injection Valve Circuit/Open (Bank 2 Unit 2)
DTC P2056 meaning on BMW
DTC P2056 for BMW indicates a fault with the Reductant Injection Valve Circuit for Bank 2 Unit 2. This fault code is related to the AdBlue system, which is used for reducing harmful emissions in diesel engines. The Reductant Injection Valve is responsible for injecting the AdBlue solution into the exhaust system to help neutralize harmful pollutants.
BMW DTC P2056 symptoms
Symptoms of DTC P2056 on a BMW may include:
- Check Engine Light illuminated
- Reduced engine performance
- Increased fuel consumption
- Excessive smoke from the exhaust
BMW DTC P2056 causes
Common causes of DTC P2056 on a BMW include:
- Faulty Reductant Injection Valve
- Wiring or connector issues in the Reductant Injection Valve Circuit
- Defective AdBlue pump
- Low AdBlue fluid level
BMW DTC P2056 seriousness
DTC P2056 should not be ignored as it can lead to increased emissions and potential damage to the engine and exhaust system. It is important to address this issue promptly to ensure the vehicle meets emission standards and operates efficiently.
How to diagnose DTC P2056 on BMW
To diagnose DTC P2056 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and related data
- Inspect the Reductant Injection Valve and its wiring for any visible damage
- Check the AdBlue fluid level and quality
- Test the functionality of the AdBlue pump
How to fix DTC P2056 on BMW
To fix DTC P2056 on a BMW, the following steps may be taken:
- Replace the faulty Reductant Injection Valve
- Repair any damaged wiring or connectors in the circuit
- Refill or top up the AdBlue fluid to the correct level
- If necessary, replace the AdBlue pump
How to erase DTC P2056 on BMW
To erase DTC P2056 on a BMW, the fault code can be cleared using a diagnostic scanner. After the repair has been completed, the code can be reset to turn off the Check Engine Light and ensure that the issue 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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