CHECK ENGINELIGHT CODE Look up a code
OBD-II CODE / Transmission

P0700 · Transmission control system requested the warning light

The powertrain scan reports a transmission-control request to illuminate the malfunction indicator.

Sources checked · Independent technician review pending · Report an error

Start here

Scan the transmission module with a compatible tool and save its specific fault codes.

Why your reader may stop here

A basic emissions scan may show P0700 while the transmission module holds the fault that triggered the request. Record both sets of results, including whether each code is current or stored.

Note how the car shifts

Write down any slipping, harsh shifting or limited-gear behavior and when it happens. If the car is losing drive or feels unsafe, pull over safely and arrange help.

Follow the companion code

GM’s 23-NA-210 bulletin covers a particular group of vehicles with P18AE alongside P0700. A different companion code or transmission can lead to a different diagnostic path.

Sources

Keep reading