AutoCodes – Chevrolet – P248A Chevrolet

P248A Chevrolet Code - Reductant Heater 1 Feedback Circuit Low 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: P248A Chevrolet indicates Reductant Heater 1 Feedback Circuit Low 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.

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Code Popularity 2,643

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 29, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P248A Chevrolet Description

As reductant will freeze at temperatures below -11°C (12°F), there are 2 reductant heaters located in the reductant tank. One heats the reductant in the tank, and one heats the reductant supplied to the reductant injector supply pipe. The Engine Control Module (ECM) monitors the reductant temperature in the tank in order to determine if the reductant temperature is below its freeze point. If the ECM determines that the reductant may be frozen, it activates a defrost strategy energizing the reductant heater. This energizing action terminates when the temperature sensor measures a threshold value over which the heater must be deactivated. The Diagnostic Trouble Code (DTC) will be set when there is greater than a 3 V difference between battery voltage and reductant tank heater voltage.

OBDII Code P248A Chevrolet - Reductant Heater 1 Feedback Circuit Low Voltage - AutoCodes.com — P248A Chevrolet Code - Reductant Heater 1 Feedback Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P248A Chevrolet?

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 P248A Chevrolet?

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 P248A Chevrolet 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P248A Chevrolet Code

1. What are common symptoms of OBDII code P248A (Chevrolet) - Reductant Heater 1 Feedback Circuit Low Voltage?

The common symptoms include the check engine light illuminating, reduced engine performance, and potential issues with the exhaust system.

2. What can cause OBDII code P248A (Chevrolet) to trigger?

Possible causes for this code include a faulty reductant heater 1, damaged wiring or connectors in the feedback circuit, or a malfunctioning powertrain control module (PCM).

3. How serious is the OBDII code P248A (Chevrolet) - Reductant Heater 1 Feedback Circuit Low Voltage?

While this code may not cause immediate harm to the vehicle, it can lead to increased emissions and reduced fuel efficiency if left unresolved. It is recommended to address the issue promptly.

4. How can I diagnose OBDII code P248A (Chevrolet) at home?

You can diagnose this code using an OBDII scanner to read the code and identify the specific issue. However, further diagnostic steps may require professional equipment and expertise.

5. What are some repair tips for fixing OBDII code P248A (Chevrolet)?

Repair tips may include checking and repairing any damaged wiring or connectors in the feedback circuit, testing and replacing the reductant heater 1 if necessary, and ensuring proper connection to the PCM.

6. Can I continue driving with OBDII code P248A (Chevrolet) present?

While it may be possible to drive with this code present, it is advisable to address the issue promptly to prevent potential damage to other components and ensure optimal vehicle performance.

7. How much does it cost to repair OBDII code P248A (Chevrolet)?

The cost of repairing this code can vary depending on the specific cause of the issue, labor rates in your area, and the cost of any replacement parts needed. It is recommended to obtain quotes from reputable mechanics or repair shops.

8. Are there any recalls related to OBDII code P248A (Chevrolet)?

Recalls related to this specific OBDII code would be issued by Chevrolet or the relevant regulatory authorities. It is advisable to check with your local dealership or online resources for any recall information.

9. Can a DIY enthusiast fix OBDII code P248A (Chevrolet) at home?

While some components related to this code may be accessible for DIY repairs, diagnosing and fixing the issue correctly may require specialized tools and knowledge. It is recommended to consult a professional mechanic for assistance if needed.

10. How often does OBDII code P248A (Chevrolet) occur in Chevrolet vehicles?

The occurrence of this specific OBDII code can vary depending on the vehicle's age, maintenance history, and driving conditions. If you encounter this code, it is essential to address it promptly to avoid potential complications.