If the P0011 is still coming back after the camshaft sensor and wiring replacement, then the root cause is likely elsewhere in the variable valve timing (VVT) system. On the Hyundai ix35, common culprits include:
VVT (OCV) solenoid sticking or partially clogged — cleaning might give temporary relief, but if wear is present, replacement is recommended.
Oil quality/pressure issues — old, dirty, or low oil can cause poor VVT operation. Make sure you’re using the correct grade and that the oil pump is maintaining pressure.
Timing chain stretch or tensioner wear — if the chain is out of spec, the ECU can interpret this as “over-advanced” timing.
ECU adaptation values — sometimes need to be reset after parts replacement.
Since towing puts more load on the engine, I’d be cautious about heading on a long trip without resolving the cause — especially if the issue returns quickly after a “temporary fix.”
If possible, get a live-data scan (tools like InCarDoc can log camshaft target vs. actual angles) to see exactly when and how the timing is drifting. That can help pinpoint whether the problem is mechanical (chain/solenoid) or oil-related before you risk a breakdown on holiday.
