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P0700 – Transmission Control System Malfunction – Fiat Dualogic / Alfa Selespeed (Fiat / Alfa Romeo / Lancia Dualogic automated manual)

Fault code P0700 means "Transmission Control System Malfunction – Fiat Dualogic / Alfa Selespeed". It is common on Dualogic automated manual (Punto, Grande Punto, 500, Panda, Idea, Doblò), Selespeed (Alfa Romeo 147, 156, MiTo with TCT is different) engines. Below are the real-world causes, step-by-step tests and OEM part numbers.

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P0700 quick summary

Fault codeP0700
MeaningTransmission Control System Malfunction – Fiat Dualogic / Alfa Selespeed
SystemPowertrain (Engine & Transmission)
VehiclesFiat / Alfa Romeo / Lancia
Common onDualogic automated manual (Punto, Grande Punto, 500, Panda, Idea, Doblò), Selespeed (Alfa Romeo 147, 156, MiTo with TCT is different)
SeverityHigh
Can I drive?Only if it still selects gears. The gearbox can lose drive or get stuck in neutral.
Repair cost€0 – €1,500

Symptoms of P0700

  • Gearbox warning light or 'Gearbox failure' message
  • Stuck in neutral or will not select gears
  • Clicking pump running for a long time
  • Slow or jerky shifts
  • Car will not start (no neutral detected)

Most common causes of P0700 (most likely first)

Mechanic's Pro Tip

The Dualogic is a manual gearbox with a hydraulic actuator. Most failures are the electric pump, the accumulator (pressure sphere) losing its charge, or low hydraulic fluid. If you hear the pump running for long periods, check the fluid level and the accumulator first. After any repair the gearbox must be re-learned (clutch and gear positions) with diagnostic software.

  1. 1.Faulty hydraulic pump or pump relay

    Most likely

  2. 2.Accumulator (pressure sphere) losing charge

  3. 3.Low or old hydraulic fluid, leaks

  4. 4.Faulty actuator or position sensors

  5. 5.Low battery voltage

Step-by-step diagnostic guide

  1. 1

    Read the gearbox module fault memory with MultiECUScan or Examiner.

  2. 2

    Check battery voltage and the pump relay and fuse.

  3. 3

    Check hydraulic fluid level and look for leaks.

  4. 4

    Test pump run time and accumulator pressure.

  5. 5

    Repair the pump, accumulator or actuator, then run the self-learning procedure.

How do I read fault codes? →Where the OBD2 port is, which scanner to use and how to read and clear codes step by step.

Frequently asked questions

Is the Dualogic a real automatic?

No. It is a manual gearbox with an electro-hydraulic robot doing the clutch and shifting.

Can the Dualogic be repaired?

Yes, pumps, accumulators and actuators are repaired or replaced separately – a new gearbox is rarely needed.

Related fault codes

This guide is for information only. Working on vehicles can be dangerous — if you are unsure, have the car checked by a qualified mechanic. Values can differ between model years; always check the manufacturer's repair information.