Transmission Control System Malfunction

P0700 is a general transmission fault code that appears alongside more specific transmission codes on all automatic transmission vehicles. Most commonly documented on Chrysler/Dodge/Jeep vehicles (NAG1 and 62TE transmissions), Honda and Acura (A6MF1 and BZGA transmissions), and Ford trucks with 6R80 transmissions. P0700 itself only tells you there is a TCM-detected fault — always scan for additional P07xx or P08xx codes.

A 2009 Dodge Journey stores P0700 and P0750 (shift solenoid A malfunction). The transmission is in limp mode, stuck in 2nd gear. The root cause is degraded transmission fluid that contaminated the solenoid. A transmission fluid and filter service ($150) plus shift solenoid replacement ($200–$400) resolves both codes. Had the fluid been serviced at the manufacturer's recommended 60,000-mile interval, the solenoid failure likely would not have occurred.

P0700 alone is not enough to diagnose a transmission problem. Always scan for all stored codes simultaneously — the accompanying P07xx code identifies exactly which component or circuit failed. Diagnosing P0700 without additional codes is like trying to fix a car with no other information.

Related codes often stored with P0700

What does P0700 mean?

P0700 is a general code indicating the Transmission Control Module (TCM) has detected a fault. Always check for additional transmission codes (P07xx, P08xx) stored alongside this one.

Is P0700 serious?

Fix soon — transmission shifting may be impaired.

How much does it cost to fix P0700?

Repair costs for P0700 range from $100 – $250 depending on the root cause and your vehicle.

Can I drive with P0700?

You can drive short distances but should have it repaired within 1–2 weeks to prevent further damage.

Is P0700 serious?

P0700 itself is a notification code — the seriousness depends entirely on what other transmission codes are stored alongside it. Some accompanying codes (solenoid electrical faults) are inexpensive to repair. Others (incorrect gear ratio) may indicate significant transmission wear.

Why is my transmission stuck in one gear with P0700?

Limp mode — the transmission defaults to a single gear (usually 2nd or 3rd) to allow you to drive to a shop without causing further damage. This is the TCM protecting the transmission when it detects a fault it cannot correct.

Can a transmission fluid change fix P0700?

If the accompanying code indicates a solenoid issue caused by dirty fluid, a fluid and filter service may resolve the fault. However, if the solenoid is mechanically failed, replacement is required regardless of fluid condition.