P221E

Reductant Heater C Current Too 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 fuel consumption
SCR system error message on dashboard
Increased NOx emissions

Causes

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

How to Fix

Check heater circuit fuse and relay
Check the integrity of wiring and connectors
Measure the resistance of the heating element
Check control signals from the control unit
If necessary, replace the reagent heating element

Related codes

P221F P2220 P220E