peterschubert69
Almera exhaust smoke and power loss
Summary of the thread
A 2005 Nissan Almera with a diesel engine is experiencing power loss, excessive exhaust smoke, and a foul smell, with the exhaust system warning light illuminated. The issue is suspected to be related to the diesel particulate filter, but diagnostics indicate low exhaust pressure. A whistling sound was noted, leading to the identification of a faulty exhaust back pressure sensor, which was replaced to resolve the problem.
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4 comment(s)
peterschubert69 (community.author)
Fuel consumption seems normal, but now that you mention it, I did hear a slight whistling sound from under the car a few weeks before all this started. Could that be related to the exhaust system?
thomasguenther44
That whistling sound is a definite clue. It does sound like the exhaust back pressure sensor is defective. Given the low pressure reading and the symptoms you're describing, it seems the best course of action now is to visit a workshop.
peterschubert69 (community.author)
Thanks for the advice! I took it to the workshop, and you were spot on. The exhaust back pressure sensor was faulty. Cost me 245€ to get it replaced, but it's running like new now! I appreciate the help.
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NISSAN
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ALMERA
thomasguenther44
Sounds frustrating! I had a similar experience with my Almera a while back. Reduced power and smoke are definitely not fun. Did you notice any difference in fuel consumption or any unusual noises before the problems started?