P0700

Transmission Control System Malfunction

Car Fault Codes Powertrain

Can you still drive? With care, short trips only

Typical cost Varies widely by cause

What it means

This code does not identify the fault itself; it is a flag from the transmission computer telling the engine computer that it has stored a code. To find the real problem you need to read the transmission computer codes with a capable scan tool.

Symptoms5

Check engine light on.
Harsh or delayed shifts.
Transmission stuck in one gear (limp mode).
Delayed engagement into drive or reverse.
Possibly no symptoms if the fault is minor.

Possible causes6

Low or burnt transmission fluid.
Faulty transmission sensor.
Failed shift solenoid inside the transmission.
Wiring or connector problem at the transmission.
Internal mechanical transmission fault.
Transmission computer failure (less common).

How to diagnose and fix5

Read the transmission computer codes with a scan tool that supports it; they identify the fault.
Check transmission fluid level, color and smell using the manufacturer procedure.
Inspect transmission wiring and connectors for corrosion or fluid leaks.
Address the specific transmission code found.
Do not replace the transmission before a proper diagnosis by a specialist.

Repair cost

0–500

500–2,000

2,000–5,000

5,000+

In Saudi riyals; the highlighted part is the expected range for this fault.

The range is very wide: from a fluid top-up or simple sensor to a transmission rebuild or replacement that can exceed 5,000 SAR.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.

Frequently asked questions

My scan tool shows only P0700. What now?

Basic scan tools read only the engine computer. You need a tool that reads the transmission computer to see the detailed code.

Is driving in limp mode safe?

Limp mode is meant only to get you to a workshop. Avoid high speeds and long trips, as continuing can worsen transmission damage.

This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.

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