P20C2

Reductant Heater C Control Circuit Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–111 (est.)

Symptoms

Check Engine light comes on
Possible reduction in engine power
The SCR system may stop working
Possible problems starting in cold weather
Increased NOx emissions

Causes

Open or short circuit in the heater circuit
Heater relay malfunction
Problems with the SCR control unit
Heating element failure
Poor contact in connectors

How to Fix

Check heater circuit fuses
Diagnose the resistance of the heating element
Check the integrity of wiring and contacts
Test the operation of the heater relay
If necessary, replace the heating element

Related codes

P20C1 P20C3 P20EE