P0700 — P0700 — Transmission Control System Malfunction
Drivable short-term, but fix now to avoid damage.
What P0700 means
P0700 is a general code that means the transmission control module detected a problem and turned on the check engine light. By itself it doesn't tell you the exact fault — there are almost always companion codes (like P0715, P0730, or P0750) that name the real issue. Think of it as a flag that says 'look deeper into the transmission.'
Common symptoms
- Check engine light on
- Harsh, delayed, or erratic shifting
- Transmission slipping or not engaging gears
- Vehicle stuck in a single gear (limp mode)
- Companion transmission codes stored alongside it
Common causes
- An underlying transmission fault triggering a companion code
- Faulty shift solenoid or speed sensor
- Low or dirty transmission fluid
- Wiring or connector problems at the transmission
- Failing transmission control module (TCM)
- Internal transmission wear or mechanical damage
Typical repair cost
$150 – $3500
Varies by vehicle and root cause.
Frequently asked questions
Can I drive with a P0700 code?
Sometimes, but cautiously. If the transmission feels normal you can drive gently to a shop, but if it's slipping, jerking, or stuck in limp mode, stop driving to avoid expensive damage.
How much does it cost to fix P0700?
Because P0700 is a general code, cost depends entirely on the real problem. A sensor or fluid service might be $150-$400, while major internal repairs or a rebuild can climb to $2,000-$3,500 or more.
Is P0700 serious?
It can be. P0700 means the transmission computer flagged a fault, and transmission problems left unchecked can lead to costly damage, so it should be diagnosed promptly.
Why do I need other codes to fix P0700?
P0700 only says there's a transmission fault, not what it is. A technician reads the companion codes stored with it to find the actual cause, which is what gets repaired.