P20B0Reductant metering unit temperature sensor - circuit intermittenUerratic
Generic (OBD-II) interpretation in the TuningBot DTC database.
P · PowertrainEmissionsOBD2
What P20B0 means
P20B0
Reductant metering unit temperature sensor - circuit intermittenUerratic
Generic · emissions
Data confidence78%
The control module detected a fault associated with the Reductant metering unit temperature sensor - circuit intermittenUerratic circuit or function; the stored code identifies the affected component rather than a single failure mode.
Symptoms
MIL or SCR/AdBlue warning illuminated
Possible start-count-down or torque limitation on some applications
Possible causes
Wiring
reductant metering unit temperature sensor
ECM
Recommended checks
Read NOx sensor values and dosing system status
Check reductant level and quality data
Inspect dosing valve, lines and heater operation
Check wiring and connectors of the SCR components
Check for OEM technical bulletins and software updates
Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
0B0
Specific fault index within the subsystem.
Frequently asked questions about P20B0
What does P20B0 mean?
Reductant metering unit temperature sensor - circuit intermittenUerratic. The control module detected a fault associated with the Reductant metering unit temperature sensor - circuit intermittenUerratic circuit or function; the stored code identifies the affected component rather than a single failure mode.
Is P20B0 generic or manufacturer-specific?
P20B0 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P20B0 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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