hermannweber8
Crankshaft to Camshaft Reference Value Error
Summary of the thread
A 2021 Mercedes Viano diesel engine exhibited a check engine light, reduced power, sluggish response, and increased fuel consumption, with a diagnostic error indicating a 'crankshaft to camshaft reference value' issue. The problem was suspected to be related to either the crankshaft sensor, camshaft sensor, or a misfire. After inspecting the wiring and checking for oil leaks, the crankshaft sensor was identified as the likely cause. Replacing the crank sensor resolved the issue, restoring engine performance and responsiveness.
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4 comment(s)
hermannweber8 (community.author)
I did a quick visual inspection of the wiring and didn't see anything obvious, but I haven't checked for oil leaks specifically around the sensor. When you say similar issue, was it definitely the crank sensor on yours?
friedrichcrystal34
Yes, it was the crank sensor. If the wiring looks okay and there's no obvious oil contamination, I'd start there. I'd suggest getting it checked out at a workshop.
hermannweber8 (community.author)
It sounds like the crank sensor is the most likely culprit. I replaced the crank sensor and cleared the fault codes. Everything seems to be running smoothly again, power is back, and the engine is responsive. The repair cost was around 340€ altogether.
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MERCEDES
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VIANOVITO
friedrichcrystal34
I had a similar issue on my Vito, same reference value error. Did you check the crank sensor wiring for damage? Is there any oil leaking around the sensor?