What does P0700 mean?
This code comes from the transmission control system. The engine computer stores it when the transmission module has its own fault code. P0700 itself does not say what is wrong; the transmission module's code does.
Codes are a starting point. They tell you which test failed, not which part to replace. Check for other stored codes and fix those in a sensible order.
Symptoms
- Check engine light
- Harsh, late or erratic shifting
- Transmission stuck in one gear (limp mode)
- Flare between gears
Common causes
- Low or burned transmission fluid
- Failed solenoid
- Wiring or connector problem (often at the transmission case connector)
- Internal mechanical wear
How to diagnose P0700
- Check fluid level and condition using the correct procedure for your transmission.
- Read codes from the transmission module itself, not just the engine computer.
- Check solenoid resistance and wiring.
- Perform any shift adapt/relearn after repairs.
How to fix it
- Correct the fluid level and service the fluid
- Repair wiring
- Replace the solenoid or valve body
- Repair or replace the transmission if worn
Estimated repair cost
Likely repairs for P0700 run from about $150 to $5,500, depending on the cause.
| Repair | Typical range (parts + labor) |
|---|---|
| Diagnostic fee (scan + testing) | $100 - $200 |
| Transmission fluid and filter service | $150 - $400 |
| Transmission solenoid / solenoid pack | $300 - $900 |
| Transmission rebuild or reman unit | $2,500 - $5,500 |
These are rough US estimates for an independent shop in 2026, based on typical parts prices and standard labor times. Dealers, big trucks, luxury brands and high-cost areas often run higher. They are not quotes. Use the repair cost estimator to adjust for your vehicle.
How serious is P0700?
High severity
Limp mode often locks the transmission in one gear. Drive gently and only as far as the shop.
P0700 FAQ
What does P0700 mean?
Only that the transmission computer has a code of its own. You need a scan tool that can read the transmission module to see the real fault.
Can I drive with P0700?
Depends on the underlying fault. If the transmission is in limp mode, drive gently and only to the shop.
How much does it cost to fix P0700?
It depends on the cause. The likely repairs for P0700 range from about $150 to $5,500 at an independent shop in the US, plus a diagnostic fee of roughly $100-$200. These are rough estimates; dealer prices and some vehicles run higher.
What is the most common cause of P0700?
The most common causes are: low or burned transmission fluid; failed solenoid; wiring or connector problem (often at the transmission case connector).