P248A

Reductant Heater A Sense Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–167 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Increased consumption of AdBlue reagent
SCR system error message on dashboard
Possible transition to emergency mode

Causes

Open or short circuit in the heater circuit
Reagent heating element malfunction
Problems with the relay or circuit fuse
SCR control module malfunction
Poor contact in circuit connectors

How to Fix

Check the integrity of the fuses and relays of the heater circuit
Diagnose the resistance of the heating element
Check the continuity and resistance of the circuit wires
Inspect connectors for oxidation or damage
If necessary, replace the heating element or SCR control module

Related codes

P248B P248C P20EE