P0700 on a Volvo: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

You can usually drive a Volvo short-term with P0700, but stop if the transmission slips or shifts harshly.

What P0700 means on a Volvo

On a Volvo, P0700 is the transmission control module flagging a stored fault. The specific problem is saved as a separate code in the TCM that a basic OBD2 reader cannot display. Most Volvos use Aisin automatic transmissions, and the code usually means the transmission control system needs a proper diagnostic scan.

Is P0700 common on Volvos?

P0700 appears on Volvos with automatic transmissions, especially XC90s, S60s, and V70s. Valve body wear on the older Aisin gearboxes and low or old transmission fluid are common triggers. Regular fluid service helps prevent these TCM faults.

Commonly reported on: XC90, S60, V70, S80.

Symptoms

Check engine light on
Harsh or delayed shifts
Transmission warning light or limp mode
Sometimes no drivability change at all

Common causes

most common: Valve body or solenoid wear
common: Low or old transmission fluid
common: Failing speed sensor
less common: Faulty TCM or wiring

How to fix it

Fix	DIY?	Typical cost
Read the stored transmission code with a professional scan tool	Mechanic	$90–160
Service the transmission fluid	Yes	$150–350
Replace the valve body or solenoid	Mechanic	$800–1800
Replace the faulty sensor	Mechanic	$150–400