Grandland X Crankshaft Sensor Issue

Your symptoms certainly point towards a potential issue with engine synchronization, and the crankshaft sensor is a prime suspect, especially given the mileage. Has the timing chain ever been checked or replaced? A stretched timing chain can also cause similar issues with the cam sensor and crank sensor relationship. Before jumping to conclusions, have you tried reading the error codes using an OBD2 scanner? Knowing the specific code will help narrow down the possibilities and confirm if it's indeed a crank sensor problem or something else entirely.

I don't have an OBD2 scanner. The timing chain hasn't been inspected or replaced. Given that the error code is unknown and the timing chain's condition is uncertain, is there a way to definitively determine if the crankshaft sensor is defective, or if it's perhaps the timing chain causing the problem? I want to avoid replacing parts unnecessarily.

Without an OBD2 scanner, it's tricky to pinpoint the exact cause. And given the mileage, a timing chain issue shouldn't be dismissed. However, trying to diagnose it yourself without proper tools and experience can be frustrating and potentially lead to misdiagnosis. Considering the symptoms and possibilities, my advice is to take your Grandland X to a trusted workshop. They can properly diagnose the error codes, inspect the timing chain, and accurately determine if the crankshaft sensor is indeed the problem. This will save you time, money, and prevent further complications.

I followed your suggestion and took my Grandland X to a reputable workshop. After running diagnostics, they confirmed that the crankshaft sensor was indeed defective. They replaced it, and the check engine light is now off, the engine power has been restored, and the fuel consumption is back to normal. The total repair cost was 340€.