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rudolftiger7

Boxer preheating lamp and check engine light

My 2000 Peugeot Boxer diesel has a persistent preheating lamp and check engine light, plus excessive smoke on acceleration at 236289 km. I suspect the preheating control unit. Could a bad cable or plug be the cause?

Summary of the thread

A 2000 Peugeot Boxer diesel exhibited a persistent preheating lamp, check engine light, and excessive smoke on acceleration. The initial suspicion was a faulty preheating control unit, with potential causes including a bad cable or plug connection. After confirming the glow plugs and wiring harness were fine, the issue was resolved by replacing the defective preheating control unit, eliminating the symptoms and restoring proper vehicle function.

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4 comment(s)

fionaberger22

I had similar issues with my Boxer, though I don't remember the year. Persistent preheating lamp, engine light, and smoke... sounds familiar. Did you check the glow plugs? Are they all working? Also, have you inspected the wiring harness for damage or corrosion?

rudolftiger7 (community.author)

The glow plugs are okay, and the wiring harness looks fine. But could a defective cable or plug connection cause these symptoms, like you experienced?

fionaberger22

Yes, a faulty connection can cause those issues, even if it's not obvious. But given the symptoms and your suspicion, the preheating control unit itself may be the problem. If you don't have diagnostic tools, a workshop visit might be best.

rudolftiger7 (community.author)

The preheating control unit was defective. A replacement and labor cost 95€. The symptoms are gone, and the van is running well again.

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PEUGEOT

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BOXER