Transmission control system requested warning lamp

What the code means

The powertrain controller was told that the transmission controller stored a fault.

Severity and driving

Depends on shifting behavior; avoid driving if slipping or engagement is unsafe

Plausible causes

A separate transmission code is stored
Transmission electrical/hydraulic/mechanical issue

Next checks

Read enhanced transmission codes with compatible equipment
Record fluid leaks and shift behavior
Do not rely on P0700 alone for parts replacement

Source and boundary

Code structure follows SAE J2012. Manufacturer-specific definitions, pinpoint tests, wiring, torque, fluids, and repair procedures require authoritative information for the exact vehicle.

SAE J2012 Diagnostic Trouble Code DefinitionsReviewed 2026-08-13

Link this code to a diagnosis