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P2767 — Inputturbine Shaft Speed Sensor B Circuit No Signal

Manufacturer-specificPowertrain (engine & transmission)

P2767 indicates that the engine control module has not received a signal from the turbine shaft speed sensor on bank B. This sensor monitors the speed of the turbocharger’s turbine shaft and its absence can cause the ECU to treat the turbo as stalled or inoperative.

Symptoms

What causes it — most likely first

1. Faulty turbine shaft speed sensor (bank B)

The sensor itself may be damaged, burnt out, or its internal coil wound may be broken, preventing any signal from reaching the ECU.

2. Open or shorted wiring or connector on bank B sensor circuit

A break or short in the sensor’s wiring harness, a corroded or damaged connector, or a pin that is not making contact can block the signal.

3. Damaged turbocharger bearing or impeller causing the shaft to stop rotating

If the turbo’s mechanical components are seized or the shaft has lost rotation, the sensor will not detect speed.

4. Contaminated or clogged turbocharger oil line affecting sensor operation

Oil that has become contaminated can impair sensor function or damage the sensor housing.

5. Defective PCM/ECM (rare)

A malfunctioning control module could fail to process the sensor signal, but this is uncommon compared to hardware faults.

How it's diagnosed

  1. Verify the Check Engine Light is on and read the P2767 code with a scan tool.
  2. Inspect the bank B turbine shaft speed sensor for visible damage and check for proper connector seating.
  3. Use a multimeter to test continuity of the sensor wiring and confirm no open or short circuits.
  4. Measure the sensor output voltage while the turbo is spinning to ensure a signal is present.
  5. Check the turbocharger for bearing wear or shaft rotation issues and inspect the oil line for blockage or contamination.

Code facts & related codes

SystemPowertrain (engine & transmission)
StandardizationManufacturer-specific (P1/B1/C1/U1)
Related codesP2760 — Torque Converter Clutch Pressure ContrP2761 — Torque Converter Clutch Pressure ContrP2762 — Torque Converter Clutch Pressure ContrP2763 — Torque Converter Clutch Pressure ContrP2764 — Torque Converter Clutch Pressure ContrP2765 — Inputturbine Shaft Speed Sensor B Circ

Frequently asked

Is replacing the PCM the usual fix for P2767?

No. The code almost always results from a faulty sensor or wiring problem. Replacing the PCM is rarely necessary and should only be considered after all hardware has been ruled out.

Can a software update fix this code?

A software update might correct a misreading in rare cases, but it will not replace a missing sensor signal caused by hardware failure.

What happens if the code is ignored?

Ignoring the code can lead to reduced engine performance, possible damage to the turbocharger from improper boost control, and higher emissions.