Powertrain, generic · Transmission

P0715 Input/Turbine Shaft Speed Sensor A Circuit

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. P0715 is the general circuit code. Ford uses it for 'no signal' too: the vehicle is moving under power (engine above converter stall speed, output speed plausible) but the sensor reports under 200 rpm for 5–30 s; Ford's DPS6 dual-clutch sets it for a hardware-detected fault of input shaft sensor 1. Subaru-based systems flag an open or shorted circuit, Saab's Aisin box no input signal while the output sensor works, substituting output speed. GM does not use P0715. Limp mode, harsh shifts and a disabled converter clutch follow.

Likely causes

Speed sensor faulty (Hall IC or coil open or shorted)
Connector or harness corroded, chafed or loose pins (with internal sensors also the pass-through connector)
Metal debris on the sensor magnet or damaged reluctor wheel
Transmission module or its sensor supply faulty

Symptoms

  • Check engine and/or transmission warning lamp
  • Limp mode with fixed gear, harsh shifts
  • Torque converter clutch does not apply
  • Input speed shows 0 or implausible in the scan tool

Repair estimate

DifficultyMediumDIY possible
Parts and labour€80–450
Time0.5–2.5 h

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

What to check first

  1. Check fluid level
  2. Inspect sensor wiring
  3. Check signal on a scan tool

Parts involved

input speed sensorsensor wiringtransmission control module

Related codes

P0716P0717P0718P0720P0700P2765

References: newtonnet.co.uk, fordservicecontent.com, saabwisonline.com, saabwisonline.com.