P20B3
Reductant Heater Coolant Control Valve Circuit Low
P20B3 is an OBD-II diagnostic trouble code meaning: Reductant Heater Coolant Control Valve Circuit Low. Common causes: open or short circuit in valve circuit, coolant control valve malfunction. Estimated repair cost: $28–89.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Increased fuel consumption
- Possible problems with the SCR system
- AdBlue error message on the dashboard
Causes
- Open or short circuit in valve circuit
- Coolant control valve malfunction
- Relay or fuse problems
- Corrosion of contacts or connectors
- Control unit malfunction
How to Fix
- Check the integrity of wiring and connectors
- Check valve resistance
- Check voltage at valve connector
- Check the condition of fuses and relays
- If necessary, replace the control valve
Related codes
Error P20B3 by Vehicle Brand
FAQ
What does the P20B3 code mean?
P20B3 is an OBD-II diagnostic trouble code that indicates: Reductant Heater Coolant Control Valve Circuit Low
What causes a P20B3 error code?
The most common causes of P20B3 include: Open or short circuit in valve circuit; Coolant control valve malfunction; Relay or fuse problems; Corrosion of contacts or connectors.
How do I fix a P20B3 diagnostic trouble code?
To fix P20B3: Check the integrity of wiring and connectors. Check valve resistance. Check voltage at valve connector. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P20B3?
Yes, but get it checked soon
How much does it cost to fix P20B3?
The estimated repair cost for P20B3 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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