P221E
Reductant Heater C Current Too Low
P221E is an OBD-II diagnostic trouble code meaning: Reductant Heater C Current Too Low. Common causes: reagent heating element malfunction, open or short circuit in the heater circuit. Estimated repair cost: $28–167.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Increased fuel consumption
- SCR system error message on dashboard
- Increased NOx emissions
Causes
- Reagent heating element malfunction
- Open or short circuit in the heater circuit
- Problems with the heater circuit relay or fuse
- SCR control unit malfunction
- Poor contact in heater circuit connectors
How to Fix
- Check heater circuit fuse and relay
- Check the integrity of wiring and connectors
- Measure the resistance of the heating element
- Check control signals from the control unit
- If necessary, replace the reagent heating element
Related codes
Error P221E by Vehicle Brand
FAQ
What does the P221E code mean?
P221E is an OBD-II diagnostic trouble code that indicates: Reductant Heater C Current Too Low
What causes a P221E error code?
The most common causes of P221E include: Reagent heating element malfunction; Open or short circuit in the heater circuit; Problems with the heater circuit relay or fuse; SCR control unit malfunction.
How do I fix a P221E diagnostic trouble code?
To fix P221E: Check heater circuit fuse and relay. Check the integrity of wiring and connectors. Measure the resistance of the heating element. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P221E?
Yes, but get it checked soon
How much does it cost to fix P221E?
The estimated repair cost for P221E is $28–167. Actual cost depends on your vehicle, location, and labor rates.
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