P2049 Fault Code

Reductant Injector Circuit High Bank 1 Unit 1

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

The P2049 fault code indicates an issue with the reductant injector circuit for Bank 1 Unit 1. This component is responsible for injecting the diesel exhaust fluid (DEF) into the system to reduce emissions by converting harmful nitrogen oxides (NOx) into harmless nitrogen and water vapor. A malfunction in this circuit can lead to inefficient performance and increased emissions in diesel engines.

What are the symptoms of the P2049 code?

Symptoms associated with this fault code may include:

• Check Engine Light (CEL) illuminated on the dashboard
• Decreased engine performance
• Increased exhaust emissions
• Possible loss of power or limp mode activation in the vehicle
• Odor of diesel exhaust fluid if there is leakage

What causes the P2049 code?

Common causes of the P2049 fault code include:

• Faulty reductant injector
• Short circuit or open circuit in the wiring harness
• Poor electrical connections
• Defective engine control module (ECM)
• Contamination or blockage in the injector nozzle

How to fix P2049?

To resolve the P2049 fault code, the following steps should be taken:

• Inspect the wiring and connectors for any signs of damage, corrosion, or disconnection.
• Test the functionality of the reductant injector and replace it if necessary.
• Clear the fault codes and perform a test drive to ensure the issue is resolved.
• If the problem persists, further diagnostics on the engine control module and related systems may be required.