luisaschroeder2
Tahoe diesel engine power loss
Summary of the thread
A 2023 Chevrolet Tahoe with a diesel engine is experiencing power loss, poor engine response, and increased fuel consumption, accompanied by a check engine light. The suspected causes include a faulty manifold pressure sensor or a vacuum leak. After professional inspection, a large vacuum leak was identified as the root cause, leading to a faulty manifold pressure sensor. Replacing the sensor resolved the issue, restoring the vehicle's performance.
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4 comment(s)
luisaschroeder2 (community.author)
Yeah, I took a quick look but didn't see anything obvious. Where should I be focusing my search for vacuum leakage? Any specific hoses or areas that are prone to failure?
william_drache6
On my Volvo, it was a small hose near the intake manifold that had cracked. Honestly, though, with those symptoms and a possible manifold sensor issue, it might be worth getting it checked by a professional. Save yourself the headache.
luisaschroeder2 (community.author)
Thanks, I appreciate the advice. I took it to the shop, and you were right! It was a large vacuum leakage that caused the faulty manifold pressure sensor. They replaced the sensor, and the total came to 235€. Runs like new now!
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CHEVROLET
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TAHOE
william_drache6
Sounds familiar. I had similar symptoms on my old Volvo a while back. Turned out to be a faulty MAP sensor. Have you checked for any obvious vacuum leaks?