P221F

Reductant Heater C Current Too High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$39–167 (est.)

Symptoms

Check Engine light comes on
Reducing engine power (limp home mode)
Urea system fault warning
Increased NOx emissions
The SCR system may stop working

Causes

Reagent heating element malfunction
Short circuit in the heater circuit
Relay or fuse problems
SCR control module malfunction
Damage to wires or connectors

How to Fix

Check the integrity of the heating element
Check heater circuit resistance
Inspect wires and connectors for damage
Check the functionality of the relays and fuses
Diagnose the SCR control module

Related codes

P221D P2220 P222D