P0700 on a Honda: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

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

What P0700 means on a Honda

On a Honda, P0700 is a warning flag from the transmission control module rather than a specific fault. The real problem is stored as a separate code in the TCM that a basic OBD2 reader cannot show. On most Hondas this code means the transmission computer has detected a fault and needs a proper diagnostic tool to reveal it.

Is P0700 common on Hondas?

P0700 is seen on Hondas with automatic transmissions, especially Accords, Civics, and CR-Vs with higher mileage. Honda transmissions are sensitive to the correct transmission fluid, and low or old fluid can trigger TCM faults. Shift solenoids are a common failure point on older Honda automatics.

Commonly reported on: Accord, Civic, CR-V, Pilot.

Symptoms

Check engine light on
Flashing D or transmission warning light
Harsh or delayed shifting
Sometimes no drivability change at all

Common causes

most common: Faulty shift solenoid
common: Low or incorrect transmission fluid
common: Failing speed sensor
less common: Faulty pressure switch

How to fix it

Fix	DIY?	Typical cost
Read the stored transmission code with a professional scan tool	Mechanic	$80–150
Change the transmission fluid with the correct Honda ATF	Yes	$80–200
Replace the faulty shift solenoid	Mechanic	$150–500
Replace the speed sensor or pressure switch	Mechanic	$120–400