P20C5

Reductant Heater D Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–167 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Possible transition to emergency mode
Increased fuel consumption
SCR error message on dashboard

Causes

Open or short circuit in the heater circuit
Reagent heating element malfunction
Relay or fuse problems
SCR control module malfunction
Poor contact in connectors

How to Fix

Check heater circuit fuses and relays
Inspect the wiring harness for damage
Check the resistance of the heating element
Diagnose the SCR control module
Check connections and connectors in the circuit

Related codes

P20C4 P20C6 P20EE