P07A3 — Transmission Friction Element A Stuck On

P07A3: Transmission Friction Element A Stuck On — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Transmission Friction Element A Stuck On. Basic catalogue definition; diagnostic details have not yet been reviewed.

Affected system: Powertrain

Symptoms

  • If transmission friction element A remains engaged, shifts may feel harsh or may not complete normally.
  • Slipping, unusual gear selection or weak acceleration may also be reported.

Possible causes

  • Low or contaminated transmission fluid and internal friction-element wear are possible contributors.
  • Hydraulic control trouble or damaged transmission wiring can also interfere with engagement.

What to check

  • Check applicable service information and transmission codes, then look for external fluid leaks.
  • Assess fluid level and condition using the maker's procedure; inspect connectors and compare commanded engagement with transmission response before opening the gearbox.

Also written as: P07A3-00, P07A300, PO7A3 (some scan tools add the fault-type byte, e.g. -00).