P0715 — Input/Turbine Speed Sensor Circuit Malfunction

P0715 means the transmission control module lost the input shaft speed signal. Expect limp mode and harsh or missing shifts until it's addressed.

Cost range: $150–$900. Severity: high. Safe to drive? Limited driving only. Limp mode protects the transmission but shouldn't be relied on.

Most common causes of P0715

  1. Failed input speed sensor — Frequently accessible from outside the case. ($150–$500)
  2. Wiring or connector fault — ATF wicking up the harness corrodes the pins. ($100–$350)
  3. Low or contaminated transmission fluid — Check level and condition before anything else. ($100–$350)
  4. Internal transmission damage — The costly outcome — confirm with a scan tool comparison of input vs output speed. ($2,000+)

Symptoms drivers report with P0715