P20C7
Reductant Heater D Control Circuit Low
P20C7 is an OBD-II diagnostic trouble code meaning: Reductant Heater D Control Circuit Low. Common causes: open or short circuit in the heater circuit, reductant heater malfunction. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Reduced engine power (emergency mode)
- Increased fuel consumption
- Increased NOx emissions
- SCR system error message on dashboard
Causes
- Open or short circuit in the heater circuit
- Reductant heater malfunction
- Relay or fuse problems
- Poor contact in connectors
- SCR control module malfunction
How to Fix
- Check heater circuit fuses and relays
- Inspect the wiring harness for damage
- Check heater resistance
- Check the voltage at the heater terminals
- If necessary, replace the reductant heater
Related codes
Error P20C7 by Vehicle Brand
FAQ
What does the P20C7 code mean?
P20C7 is an OBD-II diagnostic trouble code that indicates: Reductant Heater D Control Circuit Low
What causes a P20C7 error code?
The most common causes of P20C7 include: Open or short circuit in the heater circuit; Reductant heater malfunction; Relay or fuse problems; Poor contact in connectors.
How do I fix a P20C7 diagnostic trouble code?
To fix P20C7: Check heater circuit fuses and relays. Inspect the wiring harness for damage. Check heater resistance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P20C7?
Yes, but get it checked soon
How much does it cost to fix P20C7?
The estimated repair cost for P20C7 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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