P248D GMC Code - Reductant Heater 2 Feedback Circuit High Voltage
Quick Answer
As reductant will freeze at temperatures below -11°C (12°F), there are 2 reductant heaters located in the reductant tank. Common causes include Faulty Reductant Line Heater, Reductant Line Heater harness is open or shorted, Reductant Line Heater circuit poor electrical connection. 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
- P248D GMC indicates Reductant Heater 2 Feedback Circuit High Voltage.
- Common causes
- Common causes include Faulty Reductant Line Heater, Reductant Line Heater harness is open or shorted, Reductant Line Heater circuit poor electrical connection.
- 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.
Code P248D GMC Description
What are the Possible Causes of the DTC P248D GMC?
- Faulty Reductant Line Heater
- Reductant Line Heater harness is open or shorted
- Reductant Line Heater circuit poor electrical connection
- Faulty Reductant Pump and Sensor Assembly
- Faulty Reductant Control Module
How to Fix the DTC P248D GMC?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P248D GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P248D GMC Code
1. What are the common symptoms of OBDII code P248D GMC (Reductant Heater 2 Feedback Circuit High Voltage)?
The common symptoms include the Check Engine Light illuminating on the dashboard, reduced engine performance, and potential issues with the vehicle's emissions system.
2. What causes the OBDII code P248D GMC to trigger (Reductant Heater 2 Feedback Circuit High Voltage)?
The code is typically triggered by a malfunction in the reductant heater 2 feedback circuit, which can be caused by wiring faults, a faulty heater element, or issues with the reductant heater control module.
3. How serious is the OBDII code P248D GMC (Reductant Heater 2 Feedback Circuit High Voltage)?
While this code may not cause immediate harm to the vehicle, it can lead to increased emissions, reduced fuel efficiency, and potential long-term damage to the emissions system if left unresolved.
4. Can I continue driving with the OBDII code P248D GMC active?
It is not recommended to drive with the code active, as unresolved issues with the reductant heater system can lead to potential failures in the emissions system and may impact the vehicle's overall performance.
5. How can I diagnose the OBDII code P248D GMC at home?
You can diagnose this code using an OBDII scanner to retrieve the specific fault code, then inspect the reductant heater 2 circuit for any visible wiring issues or test the heater element for continuity using a multimeter.
6. What are some repair tips for addressing OBDII code P248D GMC?
Repair tips include checking and repairing any damaged wiring in the reductant heater 2 circuit, testing and replacing the heater element if necessary, and resetting the fault code with an OBDII scanner after repairs are completed.
7. Can I reset the OBDII code P248D GMC without fixing the underlying issue?
While you can temporarily clear the code with an OBDII scanner, it is crucial to address the root cause of the problem to prevent further issues and ensure the vehicle's emissions system functions properly.
8. How much does it typically cost to repair OBDII code P248D 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 diagnosis and repair estimate.
9. Is OBDII code P248D GMC covered under warranty?
If your vehicle is still under warranty, the repair for this code may be covered depending on the terms of the warranty and the specific components involved. Check with your dealership or manufacturer for more information.
10. How can I prevent OBDII code P248D GMC from recurring in the future?
Regular maintenance of the emissions system, including checking the reductant heater components for any signs of wear or damage, can help prevent the code from recurring. Addressing any issues promptly can also help maintain the system's efficiency.
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