BMW DTC P2059 – Reductant Injection Air Pump Control Circuit/Open
DTC P2059 meaning on BMW
DTC P2059 on a BMW indicates a fault with the Reductant Injection Air Pump Control Circuit. This code is triggered when the Engine Control Module (ECM) detects an open circuit or a lack of communication from the reductant injection air pump control module.
BMW DTC P2059 symptoms
Symptoms of DTC P2059 on a BMW may include:
- Check Engine Light illuminated
- Reduced engine performance
- Increased fuel consumption
- Possible exhaust emissions issues
BMW DTC P2059 causes
Common causes of DTC P2059 on a BMW include:
- Faulty reductant injection air pump control module
- Open or short circuit in the wiring harness
- Corrosion or poor connections in the electrical system
- Defective reductant injection air pump
BMW DTC P2059 seriousness
DTC P2059 should be addressed promptly as it can lead to reduced engine efficiency and increased emissions. Ignoring this fault may result in further damage to the vehicle’s emission control system.
How to diagnose DTC P2059 on BMW
To diagnose DTC P2059 on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the ECM.
- Inspect the wiring harness for any visible damage, corrosion, or loose connections.
- Check the reductant injection air pump control module for proper operation.
- Perform a continuity test on the circuit to identify any open or short circuits.
How to fix DTC P2059 on BMW
To fix DTC P2059 on a BMW, consider the following:
- Replace the faulty reductant injection air pump control module if necessary.
- Repair any damaged wiring or connectors in the circuit.
- Test the reductant injection air pump for proper function and replace if defective.
- Clear the fault codes from the ECM after completing the repairs.
How to erase DTC P2059 on BMW
To erase DTC P2059 on a BMW, use a diagnostic scanner to clear the fault codes stored in the ECM. Ensure that the underlying issue causing the fault code has been addressed before clearing the code to prevent it from reoccurring.
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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