Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
0B8
Specific fault index within the subsystem.
Frequently asked questions about P20B8
What does P20B8 mean?
Reductant metering unit heater control - circuit high. The control module detected that the signal in the Reductant metering unit heater control circuit stayed above the expected operating range.
Is P20B8 generic or manufacturer-specific?
P20B8 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P20B8 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.
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