Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
0B3
Specific fault index within the subsystem.
Frequently asked questions about P20B3
What does P20B3 mean?
Reductant heater coolant control valve - circuit low. The control module detected that the signal in the Reductant heater coolant control valve circuit stayed below the expected operating range.
Is P20B3 generic or manufacturer-specific?
P20B3 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P20B3 at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
ItalianoIT
DeutschDE
EspañolES
PortuguêsPT
FrançaisFR
РусскийRU