barbara_moeller1

Lacetti battery draining issue

Experiencing a perplexing issue with my 2005 Chevrolet Lacetti diesel. Odometer reads 225584 km. The battery keeps draining heavily. Symptoms include an error message displayed in the speedometer, weak and flickering lights, an error stored in the ECU’s error memory, and a weak battery when attempting to start the engine. Suspect the battery sensor might be defective. Anyone encountered this?

A 2005 Chevrolet Lacetti diesel is experiencing a battery draining issue, with symptoms like error messages, weak lights, and a weak battery. The suspected cause is a defective battery sensor, which can lead to incorrect charging by the alternator. The solution involves checking the sensor and its connections, and a workshop diagnosis confirmed the sensor was faulty, resolving the issue after replacement.

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4 comment(s)

Sounds familiar. I've got a Lacetti too. Had similar electrical gremlins – low battery warnings, lights acting up. Did you check the battery sensor wiring and connections? They can corrode and cause weird readings.

Yes, I checked the wiring and connections; they seem fine visually. What was the eventual cause in your case? Was it the sensor itself or something else drawing power?

Turns out it was the sensor itself throwing off the charging system. The alternator was trying to compensate for a false reading, overcharging then undercharging, killing the battery slowly. I'd suggest getting it properly diagnosed at a workshop; they have better tools for pinpointing it.

Thanks for the tip. I took it to a workshop as you suggested. Indeed, it was the battery sensor. Repair cost me 315€. All error messages are gone and the car starts fine now.

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CHEVROLET

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LACETTI