die1446go

Electrical and turbo problems on a Peugeot 406 Diesel

Hello everyone, I own a 1998 Peugeot 406 with a diesel engine and 247,000 km on the odometer. I'm experiencing several problems: 1. General electrical malfunction. 2. ECU box not found, making it impossible to read fault codes. 3. The engine cooling fan is constantly activated. 4. The turbo is no longer boosting, but there is no abnormal smoke. Has anyone ever encountered these problems or have any advice on how to solve them? Thanks in advance for your help!

(Translated from French)

A 1998 Peugeot 406 Diesel is experiencing multiple issues, including a general electrical malfunction, an unresponsive ECU box, a constantly running engine cooling fan, and a non-functioning turbo without abnormal smoke. Possible causes include a faulty coolant temperature sensor affecting the fan operation and potential ECU communication issues. Suggested solutions involve checking and possibly replacing the coolant temperature sensor and ensuring all sensor connections are clean and secure.

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For the issue with the engine cooling fan constantly running, start by checking the coolant temperature sensor. A faulty sensor can send incorrect signals to the ECU, causing the fan to run continuously. Ensure the sensor connections are clean and secure. If the problem persists, consider replacing the sensor. Let me know how it goes or if you have any other questions!

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PEUGEOT

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406