P20C1

Reductant Heater C Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$39–167 (est.)

Symptoms

Check Engine Light Is On
Reduced engine performance
Increased emissions of nitrogen oxides (NOx)
Possible problems with passing technical inspection
SCR system error message on dashboard

Causes

Broken wires in the heater circuit
Heater relay malfunction
Damage to the heating element itself
Connector problems or contact corrosion
SCR control module malfunction

How to Fix

Check the integrity of the wiring and connectors of the heater circuit
Check the resistance of the heating element
Check the functionality of the heater relay
Scan for additional SCR system trouble codes
Replace faulty heating element or circuit components as necessary

Related codes

P20C0 P20C2 P20B9