Trend Health Ecu 128 Sid 155 Fail 00 Q&a Volvo D12 Diesel Engine Issues Egr Valve The freightliner ecu 128 code is a diagnostic code that provides valuable information about the health and performance of your freightliner vehicle’s engine control unit Check your egr valve for pro By Cara Lynn Shultz Cara Lynn Shultz Cara Lynn Shultz is a writer-reporter at PEOPLE. Her work has previously appeared in Billboard and Reader's Digest. People Editorial Guidelines Updated on 2025-11-04T04:52:22Z Comments The freightliner ecu 128 code is a diagnostic code that provides valuable information about the health and performance of your freightliner vehicle’s engine control unit Check your egr valve for pro Photo: Marly Garnreiter / SWNS The freightliner ecu 128 code is a diagnostic code that provides valuable information about the health and performance of your freightliner vehicle’s engine control unit. Check your egr valve for proper operation and make sure it is not sticking due to excessive soot/carbon buildup. You most likely have a wiring issue. Q&A Volvo D12 Diesel Engine Issues ECU 128 SID 155 Fail 00, EGR Valve Ecu 128, sid 155, fail 00 is and egr circuit fault. Can you hit a dash button and get more numbers? 155/00 is a code for very high soot level. The Surprising Benefits And Considerations Of Botox For Mens Balls Does Trumps Son Sing Unveiling The Truth About Donald Trump Jrs Vocal Talents Exploring The Age Difference Between Jerry Solomon And Nancy Kerrigan Unlock The Power Of Mini Stepper Workout Benefits For A Healthier You La Melo Stats A Deep Dive Into His Basketball Journey Many innate breaches can prompt the ecu 128 code on your freightliner truck. Most likely you have an issue with the egr valve. How can you clear ecu 128 code? It means that the engine ecu has a code in it. I have fault code 128s155 00 and 128s231 09 on the dash of my 2008 freightliner century 60 series. Ecu 128 is a generic fault code typically related to engine electronics in freightliner trucks. Injector harness or wiring near the ecm is most common. Give me a couple of minutes to review your issue and i will assist you. If it is new, then the delta p sensor is either plugged or the delta p calibration counts are off and it needs to be calibrated. Q&A Volvo D12 Diesel Engine Issues ECU 128 SID 155 Fail 00, EGR Valve First, engine issues, ranging from oil or coolant leaks, poor fuel quality, or even cylinder. Someone told me i needed to change the harness and i. The ecu does indicate an engine problem, but that sid number is listed as a generic number, system dianostic code #4. You are going to need to hook the bus up to a. Ecu 128 only identifies the module, it is not a fault code. Fmi 04 is low voltage. The way you get rid of it is by fixing the problem that caused the ecu 128 code to appear. You cannot just clear the ecu 128 code. If found likey the egr will. Q&A Volvo D12 Diesel Engine Issues ECU 128 SID 155 Fail 00, EGR Valve Could also be a bad injector, but i would check all wiring first. It could be triggered by faulty sensors, loose electrical connections, or outdated ecu. You should also get a. The 128 and 155 are modules that have a fault code but they. There should be an spn and a fmi number for the code. What are the causes of the ecu 128. The ecu 128 code is a diagnostic trouble code that indicates a problem with the electronic control unit (ecu) in your freightliner vehicle. When this code is active the engine will only run for about two minutes unless you initiate a parked regen, otherwise it's programmed. Q&A Volvo D12 Diesel Engine Issues ECU 128 SID 155 Fail 00, EGR Valve Q&A Volvo D12 Diesel Engine Issues ECU 128 SID 155 Fail 00, EGR Valve Close Leave a Comment