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S40 Diesel Reduced Engine Power and Smoke

Hey, my 2004 Volvo S40 diesel is giving me grief. Only 37930 km and I'm getting seriously reduced engine power and plumes of smoke when I put my foot down. I reckon it's the DPF, am I right?

A 2004 Volvo S40 diesel with only 37,930 km is experiencing reduced engine power and excessive smoke, likely due to a blocked diesel particulate filter (DPF). The issue was initially suspected to be the DPF, but without diagnostic confirmation, other sensor faults could mimic these symptoms. A workshop visit confirmed the DPF was defective, and replacing it resolved the problem.

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4 comment(s)

Sounds like a blocked DPF. Has the backpressure been checked? Any fault codes showing up? When was the vehicle last inspected?

Backpressure hasn't been checked, but I don't have the kit. No warning lights on the dash, so I didn't bother checking for codes. Inspection was a year ago. Any idea what a new DPF would set me back?

Symptoms strongly point to a defective diesel particulate filter. Without diagnostic confirmation, filter replacement is a gamble, and sensor faults can mimic DPF issues. Workshop visit is advisable.

Cheers for the advice! Bit the bullet and took it to a garage. Turns out the DPF was completely shot. Cost me 1550€ for a new one, but at least it's sorted.

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VOLVO

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S40