Mot 1654 Renault

The Mystery of "MOT 1654 Renault": A Garage Code or an Internet Ghost?

If you’ve typed "MOT 1654 Renault" into a search engine, you are likely in one of two situations:

If you’ve plugged a diagnostic tool into a Renault (especially a Laguna, Mégane, Scénic, or Espace from the early 2000s) and seen the code MOT 1654 — or the equivalent DF054 — you’re likely staring at a frustrating mix of electrical gremlins and mechanical uncertainty. mot 1654 renault

Q: My mechanic says I need a new ECU. Is that true?
A: Almost never. ECU failure for boost control is exceptionally rare. If a mechanic skips vacuum diagnostics and blames the ECU, find a new mechanic. The Mystery of "MOT 1654 Renault": A Garage

Because the MOT test now includes a rigorous check for the Malfunction Indicator Lamp (MIL) and emissions readiness, if your Renault’s computer logs a 1654, the EML (Engine Management Light) will come on. And an illuminated EML is an automatic MOT failure in the UK. Visually inspect the engine bay wiring harness

: If your Renault enters "limp mode," mechanics frequently encounter the DF046 code

• Visually inspect the engine bay wiring harness. Look specifically for wires rubbing against the engine block or transmission casing.
• Check the connector to the accelerator pedal. Unplug it, check for corrosion, and plug it back in firmly.

3. Accelerator Pedal Position Sensor (Potentiometer)

The electronic accelerator pedal sends a voltage signal to the ECU dictating how much torque the driver wants. If the potentiometer inside the pedal is failing, or if the wiring plug under the dashboard is loose, the ECU may receive an implausible signal, resulting in a DF1654 code.