I have some strange issues with my car (Hyundai Tucson Gsi Crtd 2Wd A, 2l engine, diesel, 2007, 76000m). When starting from cold, it gets a p0299 (underboost) error, MIL and limp mode. This happens soon after the car starts moving, but not when stationary on idle.
The limp limits the rmp to 3000, so I reset the error codes while driving, using a mobile app. If I do this before the engine gets hot, the error happens again, MIL, limp etc. However, if I drive until the engine gets hot and then erase the error code, it drives fine and this does not appear anymore (until next morning).
But if - after deleting the p0299 while driving - I force the car too much (drive uphill, speed faster), then there is a p0234 code (overboost) logged. This does not cause the MIL, and it does not seem to limit the revs. And if I don't delete this error, then next morning I have 2 errors logged, underboost and overboost.
I've also attached a freeze frame that says nothing to me because I'm not a specialist. What I basically do is follow other people 'how to' tutorials - so far I haven't manage to blow up the car
Some things I've done: replaced the boost pressure sensor, cleaned the turbo (hot) & DPF with Mr Muscle, sprayed Revive and then Vetech dpf fluid into the air intake (should have cleaned everything), replaced the EGR valve and fixed a boost leak (EGR cooler), changed to better diesel and used various additives, changed engine oil, checked the wastegate actuator.
After all this, power is much better, except for the problem described.
Can it be anything else except for the turbo itself?
The limp limits the rmp to 3000, so I reset the error codes while driving, using a mobile app. If I do this before the engine gets hot, the error happens again, MIL, limp etc. However, if I drive until the engine gets hot and then erase the error code, it drives fine and this does not appear anymore (until next morning).
But if - after deleting the p0299 while driving - I force the car too much (drive uphill, speed faster), then there is a p0234 code (overboost) logged. This does not cause the MIL, and it does not seem to limit the revs. And if I don't delete this error, then next morning I have 2 errors logged, underboost and overboost.
I've also attached a freeze frame that says nothing to me because I'm not a specialist. What I basically do is follow other people 'how to' tutorials - so far I haven't manage to blow up the car
Some things I've done: replaced the boost pressure sensor, cleaned the turbo (hot) & DPF with Mr Muscle, sprayed Revive and then Vetech dpf fluid into the air intake (should have cleaned everything), replaced the EGR valve and fixed a boost leak (EGR cooler), changed to better diesel and used various additives, changed engine oil, checked the wastegate actuator.
After all this, power is much better, except for the problem described.
Can it be anything else except for the turbo itself?