P0700

Q: What does OBD2 code P0700 mean?

P0700 means: Transmission Control System Malfunction. General fault in the transmission control system. This is usually accompanied by other transmission-specific codes.

Transmission Control System Malfunction

General fault in the transmission control system. This is usually accompanied by other transmission-specific codes.

SeverityCritical

CategoryTransmission

Est. Repair Cost$500–$3000

Code TypePowertrain

DIY RepairProfessional

⚡ Common Causes

›Faulty transmission control module (TCM)
›Internal transmission fault
›Wiring issue in transmission harness
›Low or contaminated transmission fluid

⚠️ Symptoms

›Check engine light
›Transmission warning light
›Harsh shifting
›Limp mode (stuck in one gear)
›Slipping transmission

✅ How to Fix — Step by Step

Step 1:Check for additional transmission codes
Step 2:Check transmission fluid level and condition
Step 3:Inspect transmission wiring harness
Step 4:Test or replace TCM
Step 5:Service transmission

💡 Pro Tip: P0700 is a generic code — always look for secondary codes (P07xx or P08xx) for the specific fault.

Repair Cost Estimate

Full Repair Estimate

$500–$3000

DIY Possible?

PRO

Severity

Critical

Frequently Asked Questions

What does OBD2 code P0700 mean?+

P0700 stands for Transmission Control System Malfunction. General fault in the transmission control system. This is usually accompanied by other transmission-specific codes.

What causes code P0700?+

Faulty transmission control module (TCM); Internal transmission fault; Wiring issue in transmission harness; Low or contaminated transmission fluid

How do I fix code P0700?+

Check for additional transmission codes; Check transmission fluid level and condition; Inspect transmission wiring harness; Test or replace TCM; Service transmission

How much does it cost to fix P0700?+

Estimated repair cost for P0700 is $500–$3000.

Is P0700 DIY-friendly?+

P0700 typically requires professional equipment and a qualified mechanic.