alexchrisro

Well... finally, problem solved! Man this was a tough one. Ok so apparently the problem was with a connector at the driver side,(mine is LHD). In every documentation of this problem that I had it did not tell anything about the driver side connector. I took of the panel of and apparently a blue plug right at the bottom was the cause. I had a friend who is an expert with electronics and after hours of testing saw that the harness is in short and traced a light green cable that was the cause. Then we traced the wire to the drivers side and managed to sort out the problem. Hope my experience helps others if they encounter such a problem. The trace was even harder when the diagnose (techstream) pointed the BCPS as being faulty (error: c1378, sub code: 112). Again i want to thank you all for helping me with opinions. So happy everything is ok now.

Ok... i replaced the bcps... still getting the error, i do not know what to do at this point 😞

I drove the car about 30 miles, nothing happens, code is still there and techstream can t delete it. I will buy a new bcps and see what is what. The 12v battery, before, when the brake pedal was pressed with the engine off the dome lights where loosing intensity, now with the new battery they stay constant so it is good that i changed the battery. I am sure all this mess started from that weak battery. I will keep you up to date how will i solve this problem, hopefully very soon and not something big of a deal 🙂

Delphius 1 you are right. I unplugged the bcps and nothing happend, same error so the bcps is faulty. I bought a new battery today, the code is still there, i am wondering if those capacitors will regenerate if i drive the car or should i buy another bcps. Thank you for your answer

I am thinking at the 12v battery to,I checked the voltage and it was 12,7, seems pretty good to me but i will order one tomorrow and see if i have any luck. Thank you for your answers.

Hello everybody, i need some help regarding a Lexus Rx450h with the C1378 error. This code popped out right after a check hybrid system, the error for the check hybrid system was:" lost comunication with hybrid battery suply (029a-123)". I reset this code, managed to arrive home with the car and then the C1378 code start popping up along with the check brake system in the dash. I checked the fused, i checked the brake power supply and the harness, at this point i do not know what to do anymore. I tried resetting the car by unplugging the battery and using a paper clip for the 13 4 pins in the obd... still getting the error. The cars abs esp, tcs, etc work fine, i tested them but the error is still present. At this point i do not know what to do anymore. From what documentation i found on the web, the skid ecu could be the problem but what bugs me is that all the safety functions are active and working properly. Can someone help me what to do? Thank you!

Si it seems not only bmw has problems with the timing chain... that is sad

The weird thing is that this error only appears in stop and go traffic when the engine switches from electric, also, the engine runs perfect. If the chain would be streched, i am guessing that the engine performance and smoothness would be affected. For example, in my case if i put the gearbox on S (this does not allow the engine to stop even if the hybrid kicks in) no error will pop. I driven the car for two weeks like this and no error codes poped up. As soon as i hit traffic and the engines power on and off... the error appears.

It is weird because it is a common issue on the 350's but no one solved this issue or report to solved it. Indeed this error or the 0016 appears only in stop and go traffic.

So, no one solved this issue?

Any news on the p0017 error?

The dealer is an idiot. The problem you are facing is that the tpms ecu has stuck in a loop mode and yes, you cannot clear the errors with techstream or any other diagnose. To solve the problem, simply take a paper clip and connect the 13 and 4 pins on your obd with the ignition on(not the car started, just ignition on). This will totally reset the tpms ecu.

As allways, thank you John!

Bringing this topic back again. I need to change the front discs and brake pads. Do i nned techstream for that? Should i disconnect the battery? Key fob not near the vehicle? Thank you!

Any updates?

I did not update this topic because i wanted to be sure that the problem is fixed, but for now, it's been almost an year and i did not have that issue anymore. It seems that something happened when i cleaned my throttle body. The cold starts where stupid with missfires and shakes throwing p0300 code. To cure the problem i simply unplugged the 12v battery terminals located in the boot. When i plugged the terminals back and cold started the engine, it somehow calibrated itself because for about 30s the revs where going up and down, then it settled itself and since then... no more cold start problems. As for the p0016 code, the enigma was partially solved. My guess is that the ring tone in the phazer is damaged or something. I had the vvti sensor changed(camshaft sensor) and it turns out it was bad. Now the error is still returning but very rarely. Mine pops the code when the engine is shutting off and on, so the cure this, i now start the car and drive it with the gearbox in S mode (in this mode it does not allow the engine to shut off) till the engine temperature gets to 95 C. Then i put the gearbox in D and no more p0016 code. It may sound stupid but this is how i cured the problems with my car. For this code i am guessing it could also be the crankshaft position sensor but to change it you must remove the a/c compressor and i decided to leave it like that

Thank you John for the details.

Hello John, can you give more details about this prelube system, how to fit it, where it can be found? Thank you

After i studied a little it seems that my fans are in the corect place. the 7 blade is on the left and the 5 blade fan is on the right (looking from the front of the car) but... they both spin clokwise.

John thanks a million for your post. Since then I did not have problems with overheatig... however i do not know how but today when i was cleaning the engine bay i saw the two electric fans spin in the same direction. That is why my car overheated. The car did not have any accident i do not know how this was possible, maybe when the valve recall was done the fans where not mounted corectly. Can you please tell me what is the direction of the blades rotating? Towords the exterior of the car? (One spining to the left and one to the right looking from the front of the car?) thank you very much!

Another info. If a put the car in maintenance mode and drive like i posted above there is no weird sound. Except for a nasty clunk when i stop but i think this is normal since the car is not made to be driven in maintenance mode. Again thanks for the help.

Guys i need your help... again :) now i do not know if this is normal i will try to explain the best i can. A couple days back i discovered a very strange sound. I will try to explain the best i can how this sound appears. I am starting the car, engine runs for two minutes then it shuts down and then i am starting the ac. The ac drains all the battery and then the engine kicks in to recharge the battery. Now when the engine does this if i very gentle touch the acceleracion then lift of the foot and let the car rolling at the tranny speed there is a very werid sound coming from the engine. It is like a vibration and it is feeling weird inside the cabin to. I tried to film but i do not know if my phone recorder the sound. Is this normal? Is it something that the tranny does not like when it is recharging the battery and moves the car at idle? If i very gentle touch the acceleration the sound goes away but if a lift the foot when the speed reaches the transmision idle(by this i am refering at putting the car in "drive" lift of the brake and let the car roll without acceleration) the sound reapears and this only happens when the battery is been recharged by the engine. Again thank you all for your help and answers.

Thank you very much for your answers guys!

Mmm no, not really, i was more curious about the transmission filter... :)

Thank you for your answer, another question, i found a local shop that is maintaining toyota and Lexus, They said that this gearbox has a filter and it is my choice if i want that filter to be changed or not. Is this true? Thank you