HiCustomer Welcome to JA. I am Buddy, and i will try and help. There should be some more numbers along with that code. 128 just means that is a engine code. Try using you button on your dash display and see if you can get more numbers. Let me know.
Thanks for info. What is last 6 of your truck vin#. Also does it have egr on it also.
yes for the egr
This diagnostic condition is typically:?
What sensors did you replace. Did you replace the turbo actuator or the wastegate?
Intake air sensor and barometric pressure sensor replaced -
part #23527829 and part #23527831, one was $46 and the other was $4.74 from Freightliner in San Antonio.
Do you think the turbo boost sensor might be the problem?
Thought the wastegate and the turbo actuator were the same...but the receipt from M&D Distributors in San Antonio called it an actuator, part #AIR757979-0002 ($157)
The 23527829 is the turbo boost sensor. I would check wires at plug for bent pins or loose connections.If the turbo actuator is what you replaced. It would have to be calibrated, and you have to have detroit diagnostic link program on laptop to calibrate it.This has to be set very correctly to make turbo operate properly. Here is the procedures. Here <<<< click . They should of told you that when you bought the actuator. Our parts guys do. If you have anymore questions, just ask.
Let me know if this is what you replaced.Also if you have anymore questions, just ask.
Kendall told me it was already pre-set. Can the actuator can be calibrated using a DDEC 4?
Are you in Texas?
If it's the turbo boost sensor and not the actuator, can I put my old actuator back on? Will it still need to be calibrated as well?
Sorry for long delay, i am at work.If it is a ddec4, the turbo has to be replaced. If it is a ddec5 the actuator is adjustable. They are not pre set . They have to be set to your turbo. Each turbo is different. I am in Arkansas. You can put your old one on, and it should be pretty close, but it sounds like your original problem was the actuator. I would recommend going to freightliner and have them calibrate the new actuator to your turbo.If you have anymore questions, just ask.
Thanks for the accept. No need to accept again. Thats what it sounds like to me. Could be vpod onside of block between oil filters and flywheel housing. But i would start with timing of turbo actuator.Timing of the actuator is very cruscial, i think i spelled that right, lol. If it is turning to many rpm's it will derate and try to protect itself, like the symtoms you are describing. Hope this helps you out some.If you have anymore questions, just ask
You may just be hearing the vanes in the turbo, they normally sound like a vacuum cleaner when they kick in, and may be louder with air filter out. This could tear turbo up, being out of calibration. If you do drive it, i would take it easy and not try and put a load on it.If you have anymore questions, just ask.
If you didnt turn the adjuster on the original actuator, you should be able to put it on and be very close with no problems..Glad to hear it was just air filter.One other thing you might could do if you wanna drive it with that one and possibly be safe is to remove the air line from the actuator and plug the line off, this way turbo vanes will not be kicking in.If you have anymore questions just ask.