P202C

Reductant Tank Heater Control Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–167 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
SCR System Error Message
Increased NOx emissions
Problems starting in cold weather

Causes

Open or short circuit in the heater circuit
Reagent tank heating element malfunction
Problems with the relay or circuit fuse
Engine control unit malfunction
Corrosion of contacts or connectors

How to Fix

Check heater circuit fuses and relays
Inspect the wiring harness for damage
Check the resistance of the heating element
Scan the control unit for other errors
If necessary, replace the heating element or wiring

Related codes

P202A P202B P202D