P0700
Transmission Control System Malfunction
Quick answer: P0700 means transmission Control System Malfunction. Fixing the underlying cause typically runs $195 to $4,550 at an independent shop. Drive gently, service soon.
- Severity
- Moderate
- Safe to drive?
- Drive gently, service soon
- Typical repair
- $195 to $4,550
- Most likely cause
- Low, burnt, or contaminated transmission fluid (always check this first, and it is the cheapest thing on the list)
What P0700 means
P0700 is not a diagnosis, it is a notification. Your transmission has its own computer, and when that computer stores a fault, it flags the engine computer to turn on the check-engine light, which logs P0700. The code that actually tells you what is wrong is stored in the transmission module, so a basic code reader that only shows P0700 has not really told you anything yet.
Common symptoms
What drivers usually notice with this code.
- Harsh, delayed, or slipping shifts
- Transmission stuck in one gear (limp mode), often third, with no upshifts
- Check-engine light on, sometimes with a separate transmission or wrench light
- A shudder or flare in RPM between gears
- Vehicle will not shift out of park, or shifts unpredictably
Common causes
Ranked from most to least likely.
- 1Low, burnt, or contaminated transmission fluid (always check this first, and it is the cheapest thing on the list)
- 2A failing shift solenoid, which is a common and moderately priced repair
- 3A faulty input or output speed sensor feeding the transmission computer bad data
- 4Damaged wiring, a chafed harness, or a corroded connector at the transmission
- 5A worn valve body, which is a significant repair but far short of a full rebuild
- 6Internal transmission wear, worn clutch packs, or a failing torque converter (the expensive end)
Can I keep driving?
Drive it only as far as you need to, because P0700 often comes with limp mode and the real fault behind it can range from a sensor to a failing transmission.
Severity: Moderate. A flashing check-engine light always means stop, whatever the code says.
Ballpark cost
What P0700 usually costs to fix
A range, not a quote. What you pay depends on your vehicle, your area, and which of the causes above turns out to be the real one.
Typical parts and labor at an independent shop. Dealer rates run higher.
That spread is wide on purpose. P0700 points at a system, not a single part, so the real answer depends on what the diagnosis finds. Use the range to know what to expect. If an estimate comes in higher, it usually means the specific repair is more involved, and it is always fair to ask what is included.
Next steps
What to do next
Ask the shop to pull the transmission control module codes, not just the P0700, and tell you what those specific codes are, so you understand exactly what is going on. Check the fluid level and condition early, because low or burnt fluid explains a surprising share of these. Since a P0700 on its own does not name the fault, understanding the specific sub-codes is the key to a confident decision on a big transmission repair.
Walk in informed
Ask for the diagnosis in writing and which test confirmed it, so you understand exactly what is being fixed. Fixxr shows you what the job typically costs near you, so you can approve the work with confidence.
Sources & further reading
- NHTSA — Check for vehicle safety recalls — look up open recalls for your vehicle by VIN, free
- FTC — Auto repair basics — your consumer rights at the repair shop
- AAA — Car repair and maintenance costs — independent guidance on what repairs should cost
Cost ranges and guidance reviewed July 2026.
Keep exploring
Related symptoms
P0700 FAQ
P0700 questions, answered
Can I drive with a P0700 code?
Drive it only as far as you need to, because P0700 often comes with limp mode and the real fault behind it can range from a sensor to a failing transmission.What does the P0700 code mean?
P0700 is not a diagnosis, it is a notification. Your transmission has its own computer, and when that computer stores a fault, it flags the engine computer to turn on the check-engine light, which logs P0700. The code that actually tells you what is wrong is stored in the transmission module, so a basic code reader that only shows P0700 has not really told you anything yet.What are the most common causes of a P0700 code?
The most likely causes, roughly in order, are low, burnt, or contaminated transmission fluid (always check this first, and it is the cheapest thing on the list); a failing shift solenoid, which is a common and moderately priced repair; a faulty input or output speed sensor feeding the transmission computer bad data; damaged wiring, a chafed harness, or a corroded connector at the transmission. Ask the shop to pull the transmission control module codes, not just the P0700, and tell you what those specific codes are, so you understand exactly what is going on. Check the fluid level and condition early, because low or burnt fluid explains a surprising share of these. Since a P0700 on its own does not name the fault, understanding the specific sub-codes is the key to a confident decision on a big transmission repair.How much does it cost to fix a P0700 code?
Fixing the underlying problem behind a P0700 code typically runs $195 to $4,550 at an independent shop, including parts and labor. The exact figure depends on your vehicle and which part turns out to be at fault.
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