P20C3
Reductant Heater C Control Circuit Low
P20C3 is an OBD-II diagnostic trouble code meaning: Reductant Heater C Control Circuit Low. Common causes: open or short circuit in the heater circuit, heating element malfunction. Estimated repair cost: $28–167.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Increased fuel consumption
- Problems starting in cold weather
- SCR System Error Message
Causes
- Open or short circuit in the heater circuit
- Heating element malfunction
- Relay or fuse problems
- SCR control unit malfunction
- Corrosion or 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 unit
- Check connections and connectors for corrosion
Related codes
Error P20C3 by Vehicle Brand
FAQ
What does the P20C3 code mean?
P20C3 is an OBD-II diagnostic trouble code that indicates: Reductant Heater C Control Circuit Low
What causes a P20C3 error code?
The most common causes of P20C3 include: Open or short circuit in the heater circuit; Heating element malfunction; Relay or fuse problems; SCR control unit malfunction.
How do I fix a P20C3 diagnostic trouble code?
To fix P20C3: Check heater circuit fuses and relays. Inspect the wiring harness for damage. Check the resistance of the heating element. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P20C3?
Yes, but get it checked soon
How much does it cost to fix P20C3?
The estimated repair cost for P20C3 is $28–167. Actual cost depends on your vehicle, location, and labor rates.
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