P249E GMC Code - Closed Loop Reductant Injection Control At Limit – Flow Too High
Quick Answer
The P249E diagnostic trouble code (DTC) for GMC vehicles indicates an issue with the Closed Loop Reductant Injection Control system. Common causes include Malfunctioning reductant injector, Faulty reductant control module, Clogged reductant injector nozzle. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P249E GMC indicates Closed Loop Reductant Injection Control At Limit – Flow Too High.
- Common causes
- Common causes include Malfunctioning reductant injector, Faulty reductant control module, Clogged reductant injector nozzle.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P249E GMC Description
The P249E diagnostic trouble code (DTC) for GMC vehicles indicates an issue with the Closed Loop Reductant Injection Control system. This system is responsible for injecting a reductant, typically diesel exhaust fluid (DEF), into the exhaust stream to reduce harmful nitrogen oxide emissions. When the flow of reductant is deemed too high, it means that the system is injecting too much DEF into the exhaust stream, which can lead to various performance issues and potential long-term damage if left unresolved.
Common Causes of P249E GMC
- Malfunctioning reductant injector
- Faulty reductant control module
- Clogged reductant injector nozzle
- Issues with the reductant tank sensor
- Wiring or electrical issues in the reductant injection system
Symptoms of P249E GMC
- Check engine light illuminated
- Reduced power mode activated
- Rough idling and poor acceleration
- Excessive DEF consumption
- Increased emissions
How to Fix P249E GMC
- Diagnose the specific cause of the code by using a scan tool to pinpoint the faulty component.
- Inspect the reductant injector, control module, nozzle, and tank sensor for any signs of damage or malfunction.
- Replace the faulty component, whether it be the injector, control module, nozzle, or sensor.
- Clear the DTC from the vehicle's memory using a scan tool.
- Perform a road test to ensure the code does not return and that the vehicle operates normally.
Cost to Fix P249E GMC
The typical repair costs for addressing the P249E code can vary depending on the specific cause and the cost of parts and labor. On average, repairing this issue can range from $200 to $800, including parts and labor. However, it is important to note that diagnosis time and labor rates at auto repair shops can vary based on location, vehicle make and model, and engine type. It is advisable to check with local auto repair shops for a more accurate estimate based on your specific circumstances.
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Frequently Asked Questions about P249E GMC Code
1. What are the common symptoms of OBDII code P249E GMC?
The common symptoms include the Check Engine Light (CEL) being illuminated, decreased fuel efficiency, and potential exhaust system-related issues.
2. What can cause the OBDII code P249E GMC to trigger?
This code is typically triggered by issues such as a faulty reductant injector, a clogged reductant system, or a malfunctioning reductant pump.
3. How serious is the OBDII code P249E GMC?
While this code may not cause immediate harm to the vehicle, ignoring it can lead to decreased fuel efficiency and potential damage to the exhaust system over time.
4. How can I diagnose the OBDII code P249E GMC?
Diagnosing this code usually involves using a scan tool to retrieve the code, inspecting the reductant system components for any damage or blockages, and testing the reductant injector and pump.
5. What are some repair tips for fixing OBDII code P249E GMC?
Repair tips may include cleaning or replacing the reductant injector, checking and clearing any blockages in the reductant system, and ensuring proper functioning of the reductant pump.
6. Can I drive my vehicle with the OBDII code P249E GMC?
It is generally safe to drive the vehicle with this code, but it is recommended to address the underlying issue as soon as possible to prevent further complications.
7. How much does it typically cost to repair OBDII code P249E GMC?
The cost of repair can vary depending on the extent of the issue and the specific components that need to be replaced. It is advisable to consult with a professional mechanic for an accurate estimate.
8. Can I reset the OBDII code P249E GMC on my own?
While you can reset the code using an OBDII scanner, it is important to address the root cause of the issue to prevent the code from reappearing.
9. Are there any recalls related to OBDII code P249E GMC?
Recalls related to this specific OBDII code may vary by vehicle make and model. It is recommended to check with the manufacturer or dealership for any relevant recalls.
10. How can I prevent OBDII code P249E GMC from occurring in the future?
Regular maintenance, such as checking and replacing the reductant system components as needed, can help prevent this code from occurring in the future.
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