P248B
Reductant Heater A Sense Circuit High
P248B is an OBD-II diagnostic trouble code meaning: Reductant Heater A Sense Circuit High. Common causes: open or short circuit in the heater circuit, reagent heating element malfunction. Estimated repair cost: $28–133.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Possible transition to emergency mode
- Increased fuel consumption
- Increased NOx emissions
Causes
- Open or short circuit in the heater circuit
- Reagent heating element malfunction
- Problems with the wiring harness or connectors
- SCR control module malfunction
- Corrosion of contacts in the sensor circuit
How to Fix
- Check the integrity of the heater circuit
- Inspect connectors and wires for damage
- Check the resistance of the heating element
- Scan the SCR control module for errors
- If necessary, replace the heating element
Related codes
Error P248B by Vehicle Brand
FAQ
What does the P248B code mean?
P248B is an OBD-II diagnostic trouble code that indicates: Reductant Heater A Sense Circuit High
What causes a P248B error code?
The most common causes of P248B include: Open or short circuit in the heater circuit; Reagent heating element malfunction; Problems with the wiring harness or connectors; SCR control module malfunction.
How do I fix a P248B diagnostic trouble code?
To fix P248B: Check the integrity of the heater circuit. Inspect connectors and wires for damage. Check the resistance of the heating element. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P248B?
Limited driving only, diagnose soon
How much does it cost to fix P248B?
The estimated repair cost for P248B is $28–133. Actual cost depends on your vehicle, location, and labor rates.
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