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wolfgang_schmid1

S40 Camshaft Sensor Connection Issue

Having a frustrating issue with my 2000 Volvo S40, gasoline engine. It's got about 165011 km on the clock. Lately, it's been starting really poorly, and the engine feels like it's lost a good bit of its oomph. I scanned it, and there's an error code pointing to the camshaft sensor. The wiring and plug to the sensor look a little dodgy – could be a bad connection? Anyone else run into this? This is driving me crazy!

Summary of the thread

The conversation revolves around a 2000 Volvo S40 experiencing poor starting and reduced engine performance, with a diagnostic error pointing to the camshaft sensor. The initial suspicion is a bad connection in the camshaft sensor wiring. A suggestion is made to also check the crankshaft sensor, as it can cause similar issues. Ultimately, the problem is confirmed to be the camshaft sensor connection, which is resolved by cleaning and securing it, restoring the car's performance.

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4 comment(s)

heinzkeller3

I had a similar problem with my S40, although I can't remember which year it is. Camshaft sensor issues can be a pain. Have you checked the crankshaft sensor as well? Sometimes a faulty crankshaft sensor can throw off the readings and cause similar symptoms, triggering a camshaft sensor error. It might be worth a look before you go replacing the camshaft sensor itself.

wolfgang_schmid1 (community.author)

Thanks for the quick response! I haven't checked the crankshaft sensor yet. Is it difficult to get to on the S40? And would a faulty crankshaft sensor definitely throw a code, or could it be subtly off and mess things up without triggering a specific error?

heinzkeller3

It's located near the bottom of the engine, close to the flywheel. Access can be a little tight, but it's manageable with the right tools. As for error codes, sometimes it throws one, sometimes it doesn't. If you're seeing a camshaft sensor error and the wiring looks suspect, I'd start there. But if you're not comfortable digging in, honestly, it might be worth taking it to a workshop. They can diagnose it properly and save you the headache.

wolfgang_schmid1 (community.author)

Took your advice and brought it to the shop. Turns out it was indeed the camshaft sensor connection, just like I suspected! They cleaned everything up and secured the connection properly. Cost me 95€, but now it runs like a champ again. Thanks for the help!

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VOLVO

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S40