P223A

Reductant Heater E Control Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–167 (est.)

Symptoms

Check Engine light comes on
Reduced efficiency of the SCR system
Possible increase in NOx emissions
In cold weather, problems with reagent injection may occur.
Errors in the emission reduction system

Causes

Open or short circuit in the heater circuit
Heating element malfunction
Relay or fuse problems
Control module malfunction
Corroded contacts or damaged wiring harness

How to Fix

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

Related codes

P2238 P2239 P223B