Powertrain, generic · Transmission

P07C2 Input/Turbine Shaft Speed Sensor B Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

These low/high codes are a purely electrical check of the sensor's signal voltage at the module and run even with the vehicle at rest – unlike the circuit, range, no-signal and intermittent codes, which evaluate speed while driving. Low means a short to ground, high a short to supply or, depending on the circuit, an open. No manufacturer document available to us uses this code. Sensor B is typically the second input shaft of a dual-clutch transmission (reverse and even gears); Ford's DPS6 reports it under P2765–P2767, and a VW/Getrag patent notes that the speed of a failed input shaft can be calculated from the other one. The expected logic follows GM's sensor A check (above 4.75 V).

Likely causes

Signal wire shorted to supply
Open circuit or broken wire inside the sensor
Corroded connector
Module input faulty

Symptoms

  • Check engine light (GM after one trip)
  • Limp mode, harsh shifts, no converter lock-up
  • Adaption frozen

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€120–600
Time1–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

input speed sensorsensor wiringtransmission control module

Related codes

P07C1P2765P2766P2767P07BFP06A7

References: law.cornell.edu, newtonnet.co.uk, patents.google.com, gsi.ext.gm.com.