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TuningBot DTC Database · v4.37.15

P20D5 Exhaust Aftertreatment Fuel Injector B Stuck Open

Generic (OBD-II) interpretation in the TuningBot DTC database.

P · PowertrainFuelOBD2

What P20D5 means

P20D5
Exhaust Aftertreatment Fuel Injector B Stuck Open Generic · fuel Data confidence 65%

The control module determined that the Exhaust Aftertreatment Fuel Injector B did not change state as commanded and appears stuck.

Symptoms

  • MIL illuminated
  • Possible rough running or misfire
  • Possible increased fuel consumption

Possible causes

  • Injector electrical or mechanical fault
  • Wiring or connector fault
  • Fuel supply fault
  • Air leak causing mixture deviation

Recommended checks

  • Read fuel trim / mixture adaptation values
  • Check injector circuits and compare cylinder balance
  • Check fuel pressure
  • Inspect for intake or exhaust leaks

Related and nearby codes

How to read P20D5

P

Powertrain: engine, transmission and driveline systems.

2

Generic SAE-standard code: same meaning on every make.

0D5

Specific fault index within the subsystem.

Frequently asked questions about P20D5

What does P20D5 mean?

Exhaust Aftertreatment Fuel Injector B Stuck Open. The control module determined that the Exhaust Aftertreatment Fuel Injector B did not change state as commanded and appears stuck.

Is P20D5 generic or manufacturer-specific?

P20D5 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P20D5 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.

Other file services

ECU tuningDyno-tested results by model and engine See the results →

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