Nissan Tiida 2019 Misbehaving: Black Smoke, Glaring Engine Light, Power Loss, and DPF Regeneration Failure

Hey, just saw your post. I had a similar issue with my 2016 Nissan Sentra, same old diesel engine. You hit the nail right on the head - it could indeed be the exhaust back pressure sensor; my bet's on that. When I noticed similar symptoms (believe me when I say, the black smoke can be daunting), I went to my local garage. The issue was exactly with the Exhaust Back Pressure Sensor. Took some time to diagnose, but once that was done, getting it fixed wasn't that hard. So, be prepared that this could be one of those critical issues, could damage your turbo if not addressed in time. Implications are fairly broad, lesser sensor accuracy means improper combustion, poor fuel economy and power loss. Here's a tip, when you go to the mechanic, be straight, ask them to check the exhaust back pressure sensor. Might save you the runaround time. Hope this helps, good luck with your car!

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Hey, I appreciate the really detailed response you gave! Sounds like you've been through the mill with your Sentra. Could you jog your memory a bit and tell me how much did you end up paying to fix the Exhaust Back Pressure Sensor? And since you got it done, have you noticed any other complications creeping up, related or otherwise? That black smoke's making me look bad on the roads, haha. Gonna bring up your recommendation next time I pop in to the garage. Thanks again for the tip!

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Hey there, glad you found my previous info helpful! Now, about those costs - to replace the Exhaust Back Pressure Sensor on my Nissan Sentra, I forked over roughly 250€ at my local mechanic's. It's not a tiny sum, but I was more concerned about further damage if left unhandled, so considered it money well spent! And to your other question - since that fix, I haven't dealt with any other complications specifically, reminder that every car's unique in its own charm and tantrums. But I will say this, the issue I thought was a low differential pressure in the diesel particulate filter? Turns out that was sorted out when the Exhaust Back Pressure Sensor was replaced. I haven't had any problemss in that area since then, which has been a sweet relief I tell ya! So, don’t dread about the black smoke enough to let it steal away your enjoyment of your ride. Roll up your sleeves, take the bulls by the horn, and keep on learning about your cool machine! Cheers and best of luck with your garage visit!

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Thanks a ton! Your sharing experience has seriously calmed my nerves. The price sounds fair when considering the long-term benefits and avoiding further complications. I'd rather prevent extra damage now than deal with multiple issues down the line. Good to know about your DPF issue being resolved when fixing the sensor, that's a possible ray of hope for me. Your words of encouragement really hit home, I do love my mighty Tiida despite the issues! Confirming your advice, I'll speak up about the exhaust back pressure sensor on my next garage trip. Fingers crossed, everything gets sorted. Thanks again for your help, really needed and appreciated that! Cheers!

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