P20C1
Reductant Heater C Control Circuit/Open
P20C1 is an OBD-II diagnostic trouble code meaning: Reductant Heater C Control Circuit/Open. Common causes: broken wires in the heater circuit, heater relay malfunction. Estimated repair cost: $39–167.
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
Error P20C1 by Vehicle Brand
FAQ
What does the P20C1 code mean?
P20C1 is an OBD-II diagnostic trouble code that indicates: Reductant Heater C Control Circuit/Open
What causes a P20C1 error code?
The most common causes of P20C1 include: Broken wires in the heater circuit; Heater relay malfunction; Damage to the heating element itself; Connector problems or contact corrosion.
How do I fix a P20C1 diagnostic trouble code?
To fix P20C1: 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. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P20C1?
Yes, but get it checked soon
How much does it cost to fix P20C1?
The estimated repair cost for P20C1 is $39–167. Actual cost depends on your vehicle, location, and labor rates.
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