P20BF
Reductant Heater B Control Circuit Low
P20BF is an OBD-II diagnostic trouble code meaning: Reductant Heater B Control Circuit Low. Common causes: reagent heater b malfunction, open or short circuit in control circuit. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Increased fuel consumption
- Possible starting problems in cold weather
- Unpleasant exhaust smell
Causes
- Reagent heater B malfunction
- Open or short circuit in control circuit
- Poor contact in connectors
- Faulty relay or fuse
- Problems with the SCR control module
How to Fix
- Check heater circuit fuses and relays
- Inspect the wiring harness for damage
- Check heater resistance
- Scan the SCR control module for errors
- If necessary, replace the reagent heater
Related codes
Error P20BF by Vehicle Brand
FAQ
What does the P20BF code mean?
P20BF is an OBD-II diagnostic trouble code that indicates: Reductant Heater B Control Circuit Low
What causes a P20BF error code?
The most common causes of P20BF include: Reagent heater B malfunction; Open or short circuit in control circuit; Poor contact in connectors; Faulty relay or fuse.
How do I fix a P20BF diagnostic trouble code?
To fix P20BF: 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 P20BF?
Yes, but get it checked soon
How much does it cost to fix P20BF?
The estimated repair cost for P20BF is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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