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TuningBot DTC Database · v4.37.15

P2784 Transmission input shaft speed sensor/turbine shaft speed (TSS) sensor A/8 - correlation

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

P · PowertrainEngineOBD2

What P2784 means

P2784
Transmission input shaft speed sensor/turbine shaft speed (TSS) sensor A/8 - correlation Generic · engine Data confidence 65%

The control module detected a fault associated with the Transmission input shaft speed sensor/turbine shaft speed (TSS) sensor A/8 - correlation circuit or function; the stored code identifies the affected component rather than a single failure mode.

Symptoms

  • Possible reduced power or limp mode
  • MIL illuminated
  • Possible abnormal turbocharger noise

Possible causes

  • Wiring
  • transmission input shaft speed sensor/ TSS sensor

Recommended checks

  • Compare specified vs actual boost with live data
  • Check actuator movement over the full range
  • Check hoses and vacuum lines
  • Inspect wiring and connectors

Related and nearby codes

How to read P2784

P

Powertrain: engine, transmission and driveline systems.

2

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

784

Specific fault index within the subsystem.

Frequently asked questions about P2784

What does P2784 mean?

Transmission input shaft speed sensor/turbine shaft speed (TSS) sensor A/8 - correlation. The control module detected a fault associated with the Transmission input shaft speed sensor/turbine shaft speed (TSS) sensor A/8 - correlation circuit or function; the stored code identifies the affected component rather than a single failure mode.

Is P2784 generic or manufacturer-specific?

P2784 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P2784 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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