P202B

Reductant Tank Heater Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Reduced efficiency of the SCR system
Possible errors related to the emission system
Deterioration of environmental indicators

Causes

Open or short circuit in the heater circuit
Reagent tank 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 fuses and relays
Test the resistance of the heating element
Inspect connectors for corrosion
If necessary, replace the reagent tank heater

Related codes

P202A P202C P20EE