P223B

Reductant Heater F Control Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Reduced efficiency of the SCR system
Possible increase in NOx emissions
Exhaust gas treatment system error message
In cold weather, problems with starting the system may occur.

Causes

Open or short circuit in the heater circuit
Heating element malfunction
Problems with the relay or circuit fuse
SCR control module malfunction
Corrosion or poor contact in connectors

How to Fix

Check the integrity of the heater circuit
Check the resistance of the heating element
Inspect the fuses and relays of the circuit
Check connectors and wiring harness for damage
If necessary, replace the heating element

Related codes

P223A P223C P223D