P20BC
Reductant Heater A Control Circuit High
P20BC is an OBD-II diagnostic trouble code meaning: Reductant Heater A Control Circuit High. Common causes: short circuit in the heater circuit, heating element malfunction. Estimated repair cost: $33–167.
Symptoms
- Check Engine light comes on
- Possible reduction in engine power
- Increased emissions of nitrogen oxides (NOx)
- SCR system error message on dashboard
- Problems starting in cold weather
Causes
- Short circuit in the heater circuit
- Heating element malfunction
- Problems with the SCR control module
- Broken or damaged wiring harness
- Corrosion of contacts or connectors
How to Fix
- Check the integrity of the heater wiring harness
- Measure the resistance of the heating element
- Check the voltage at the heater connectors
- Inspect connectors for corrosion
- If necessary, replace the heating element or wiring harness
Related codes
Error P20BC by Vehicle Brand
FAQ
What does the P20BC code mean?
P20BC is an OBD-II diagnostic trouble code that indicates: Reductant Heater A Control Circuit High
What causes a P20BC error code?
The most common causes of P20BC include: Short circuit in the heater circuit; Heating element malfunction; Problems with the SCR control module; Broken or damaged wiring harness.
How do I fix a P20BC diagnostic trouble code?
To fix P20BC: Check the integrity of the heater wiring harness. Measure the resistance of the heating element. Check the voltage at the heater connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P20BC?
Yes, but get it checked soon
How much does it cost to fix P20BC?
The estimated repair cost for P20BC is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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