P249C – BMW DTC

BMW DTC P249C – Excessive Time To Enter Closed Loop Reductant Injection Control

DTC P249C meaning on BMW

The Diagnostic Trouble Code (DTC) P249C on BMW indicates that there is excessive time taken to enter closed loop reductant injection control. This code is related to the vehicle’s emissions control system, specifically the reductant injection system that helps reduce harmful emissions.

BMW DTC P249C symptoms

Symptoms of DTC P249C on a BMW may include:

• Check Engine Light (MIL) illuminated
• Reduced engine performance
• Increased fuel consumption
• Possible exhaust odor or smoke

BMW DTC P249C causes

The causes of DTC P249C on a BMW can vary, but common reasons include:

• Malfunctioning reductant injection system components
• Issues with the reductant injector
• Problems with the reductant control module
• Wiring or connection issues

BMW DTC P249C seriousness

DTC P249C should not be ignored as it can lead to increased emissions and potential harm to the environment. Additionally, prolonged exposure to high emissions levels can affect the vehicle’s performance and fuel efficiency.

How to diagnose DTC P249C on BMW

To diagnose DTC P249C on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault codes
2. Inspect the reductant injection system components for any visible damage or leaks
3. Check the wiring and connections related to the reductant system
4. Test the reductant injector and control module for proper functionality

How to fix DTC P249C on BMW

Fixing DTC P249C on a BMW may involve the following steps:

1. Repair or replace any damaged reductant injection system components
2. Clean or replace the reductant injector if necessary
3. Address any wiring or connection issues
4. Reset the fault codes and perform a test drive to ensure the issue is resolved

How to erase DTC P249C on BMW

To erase DTC P249C on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer. After fixing the underlying issue causing the fault code, clearing the code will reset the Check Engine Light and ensure that the system is operating properly.

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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