P2047 Fault Code

Reductant Injector Circuit/Open Bank 1 Unit 1

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2047 fault code indicates a problem with the reductant injector circuit for Bank 1, Unit 1. This component plays a crucial role in the selective catalytic reduction (SCR) system, which helps to reduce harmful emissions in diesel engines by injecting a urea-based solution (commonly known as DEF) into the exhaust system. When this code is triggered, it signifies that the control module has detected an open circuit or an issue affecting the operation of the reductant injector, which can lead to increased emissions and potential engine performance issues.

What are the symptoms of the P2047 code?

Drivers experiencing a P2047 fault code may notice:

• Check Engine Light illuminated on the dashboard
• Increased exhaust emissions, possibly leading to failed emissions tests
• Decreased engine performance or power
• Possible poor fuel efficiency due to improper SCR system operation
• Warning messages related to the DEF system on the vehicle’s display.

What causes the P2047 code?

The most common causes of a P2047 error code include:

• Faulty reductant injector or wiring
• Open or shorted wiring and connectors in the reductant injector circuit
• Defective engine control module (ECM)
• Low DEF level or quality issues, causing the system to malfunction
• Blockage in the reductant delivery system or injector nozzle
• Corrosion or damage in the connectors associated with the reductant injector.

How to fix P2047?

To resolve the P2047 fault code, the following steps are recommended:

• Inspect the wiring and connectors associated with the reductant injector for damage or corrosion. Repair or replace as necessary.
• Test the reductant injector for proper function, replacing it if found defective.
• Check the DEF level and quality, topping off or replacing with fresh fluid if required.
• Clear any blockages in the reductant delivery system.
• If issues persist after these checks, further diagnostics may be necessary, potentially requiring a scan of the ECM and related systems.