BMW DTC P249E – Closed Loop Reductant Injection Control At Limit – Flow Too High
DTC P249E meaning on BMW
DTC P249E on a BMW indicates a fault with the Closed Loop Reductant Injection Control system, specifically that the flow is too high. This system is responsible for injecting a precise amount of urea solution (AdBlue) into the exhaust stream to reduce harmful emissions.
BMW DTC P249E symptoms
Symptoms of DTC P249E on a BMW may include the illumination of the Check Engine Light (CEL), reduced engine performance, increased fuel consumption, and potential exhaust odor.
BMW DTC P249E causes
The most common causes of DTC P249E on a BMW include a faulty reductant injector, a clogged reductant injector nozzle, wiring issues, or a malfunctioning reductant control module.
BMW DTC P249E seriousness
While DTC P249E may not cause immediate drivability issues, it is important to address this fault promptly to ensure compliance with emissions regulations and prevent potential long-term damage to the vehicle’s emissions control system.
How to diagnose DTC P249E on BMW
To diagnose DTC P249E on a BMW, a diagnostic scan tool capable of reading manufacturer-specific codes is required. The technician will need to inspect the reductant injection system components, check for wiring faults, and perform system tests to pinpoint the exact cause of the fault.
How to fix DTC P249E on BMW
Fixing DTC P249E on a BMW typically involves replacing the faulty reductant injector, cleaning or replacing the clogged injector nozzle, repairing any wiring issues, or replacing the reductant control module if necessary. It is recommended to follow the manufacturer’s repair procedures and use genuine parts to ensure proper functionality.
How to erase DTC P249E on BMW
After the underlying issue causing DTC P249E on a BMW has been resolved, the fault code can be cleared using a diagnostic scan tool. The technician can access the vehicle’s onboard computer system and clear the code, allowing the Check Engine Light to turn off. It is important to verify that the fault does not return after clearing the code.