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TuningBot DTC Database · v4.37.15

P2B90 Turbocharger/Supercharger B Temperature Sensor Circuit Low

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

P · PowertrainEngineOBD2

What P2B90 means

P2B90
Turbocharger/Supercharger B Temperature Sensor Circuit Low Generic · engine Data confidence 65%

The control module detected that the signal in the Turbocharger/Supercharger B Temperature circuit stayed below the expected operating range.

Symptoms

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

Possible causes

  • Turbocharger actuator or position sensor fault
  • Sticking variable geometry mechanism
  • Charge-air or vacuum leak
  • Wiring or connector fault

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 P2B90

P

Powertrain: engine, transmission and driveline systems.

2

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

B90

Specific fault index within the subsystem.

Frequently asked questions about P2B90

What does P2B90 mean?

Turbocharger/Supercharger B Temperature Sensor Circuit Low. The control module detected that the signal in the Turbocharger/Supercharger B Temperature circuit stayed below the expected operating range.

Is P2B90 generic or manufacturer-specific?

P2B90 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P2B90 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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