Powertrain, generic · Transmission

P0716 Input/Turbine Shaft Speed Sensor A Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

The input or turbine shaft speed sensor – a Hall sensor with square-wave output or an inductive sensor with sine output – reports the speed behind the torque converter. With output and engine speed it gives the actual gear ratio, converter slip and shift timing. P0716 means a signal is present but implausible: too high, or dropping suddenly without recovering. GM's 2025 modules count drops of more than 650 rpm between 25 ms samples and fail after more than three; the 6T70 in the Saab 9-4X flags a 1350 rpm drop for 1 s; the 2007 Allison 1000 also detects noise and swapped sensor wires; all after one trip. Ford's 6R80 flags turbine speed above 7700 rpm. The 6T70 then runs only reverse and fifth gear, with maximum line pressure and no converter clutch.

Likely causes

Loose contact or chafing in the sensor circuit
Sensor faulty, wrong air gap or metal debris
Reluctor wheel or clutch drum damaged
Sensor wires swapped after repair or interference

Symptoms

  • Check engine and/or transmission warning lamp
  • Limp mode with fixed gear (6T70: reverse and fifth only)
  • Harsh or delayed shifts
  • Torque converter clutch locked out

Repair estimate

DifficultyHardWorkshop job
Parts and labour€150–1,500
Time1–8 h

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

Parts involved

input speed sensorsensor wiringtransmission control module

Related codes

P0715P0717P0718P0721P0700

References: gsi.ext.gm.com, saabwisonline.com, newtonnet.co.uk, gsi.ext.gm.com.