P0700 means transmission control system malfunction. The transmission computer asked the engine computer to turn on the check engine light — meaning there's a transmission f
Drive gently and get it diagnosed within days.
The transmission computer asked the engine computer to turn on the check engine light — meaning there's a transmission fault stored. P0700 itself is just the messenger; the real code lives in the transmission module.
Get a scanner that reads transmission codes.
Check level and condition first.
Common.
Speed sensors, temp sensor.
Serious.
Typically $100–$3500
Fluid service $100–$250; solenoid typically $200–$500; full rebuild $2,500–$3,500+. Wide range — diagnosis matters. Estimates vary by vehicle. Costs are estimates and vary by vehicle, location, and shop.
Check transmission fluid level/condition now. If the transmission is slipping or shifting hard, limit driving. Get the transmission-specific codes read — P0700 alone doesn't tell you what's wrong.
Typically $100–$3500. Fluid service $100–$250; solenoid typically $200–$500; full rebuild $2,500–$3,500+. Wide range — diagnosis matters. Estimates vary by vehicle.
Drive gently and get it diagnosed within days.
The most common cause is transmission fault stored in tcm. Get a scanner that reads transmission codes.