P20D1Exhaust Aftertreatment Fuel Injector B Control Circuit/Open
Generic (OBD-II) interpretation in the TuningBot DTC database.
P · PowertrainFuelOBD2
What P20D1 means
P20D1
Exhaust Aftertreatment Fuel Injector B Control Circuit/Open
Generic · fuel
Data confidence78%
The control module detected an interruption (open circuit) in the Exhaust Aftertreatment Fuel Injector B Control circuit, so the expected electrical continuity was not present.
Symptoms
MIL illuminated
Possible rough running or misfire
Possible increased fuel consumption
Possible causes
Wiring
exhaust after treatment fuel injector
ECM
Recommended checks
Read fuel trim / mixture adaptation values
Check injector circuits and compare cylinder balance
Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
0D1
Specific fault index within the subsystem.
Frequently asked questions about P20D1
What does P20D1 mean?
Exhaust Aftertreatment Fuel Injector B Control Circuit/Open. The control module detected an interruption (open circuit) in the Exhaust Aftertreatment Fuel Injector B Control circuit, so the expected electrical continuity was not present.
Is P20D1 generic or manufacturer-specific?
P20D1 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P20D1 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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