4Runner Crankshaft Camshaft Reference Value Issue

Indeed. A crankshaft to camshaft reference value error often points to a problem with the crankshaft position sensor or the camshaft position sensor. It's quite common for these sensors to fail over time, especially with higher mileage. Has the check engine light come on consistently? Are there any specific OBD2 codes being reported?

The check engine light is rock solid, yep. I'll grab the OBD2 codes later today. If it is the crank sensor, is that something I can tackle myself, or am I better off taking it to a shop? Also, what does "reference value" actually mean?

The 'reference value' signifies the harmonious timing between the crankshaft and camshaft positions. If the values are misaligned, the engine's timing is off, leading to misfires and performance issues. While replacing the sensor isn't overly complex, diagnosing the true cause of the problem is key. Given the symptoms and potential for misdiagnosis (e.g. timing chain issues), I'd advise professional diagnostics to confirm it is indeed the crank sensor. If so, a quick replacement is all it needs.

Thanks a bunch for the insight. Turns out it was the crank sensor. Workshop confirmed, replaced it, and I'm back in business. Cost me around 340€ Appreciate the help!