Electronic control unit problems

Electronic control unit: Engine Control Unit. It regulates all the aspects related to the engine's proper functioning.
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Same ecu different reaction

1996 Volkswagen Golf Mid 1996 Gti 2.0L 8v AFW 230000 miles
Bosch Polocup ecu, car idles correctly, able to do adaption and drives well but when i check dtc's I often get 65535 Internal Control Module Memory Error so i bought another one and took it to the same guy who did original one and he loaded the same map. I installed the ecu i bought and when i started it, perfect, cold start revs slightly higher and drove it untill warm,idle slightly higher but ok. Next day drove car,all fine. Start car that night and car won't idle,dtc throttle position sensor. Put my other ecu back in and all is fine still. Any ideas why this happened?
Brandy from South Africa 6 months ago  
BR
2 replies 
roddebug from United States 5 months ago
Check Throttle Body retrain. ECU needs to synch with new / different throttle body. Can do this with VAG software.
Brandy from South Africa 5 months ago
Yes I do adaption everytime after
Comment

Ecu not working wire harness

2001 Volkswagen Golf 2.0 manual GL 187000 miles
Ecu not communicating with anything, wire harness issues and won’t pass emissions in Colorado engine runs though
Nadine from United States 3 months ago  
NA

Feux de recul

2012 Volkswagen Golf 1.6tdi 150000 miles
Boite automatique feux de recul ne s'allume pas mais R s'affiche au compteur
Nsl971 from other 2 years ago  
NS

High Fuel Pressure on idle 140 bar + random misfires + fuel dilution

2016 Volkswagen Golf MK7 1.4 tsi 120000 miles
Looking for guidance on a persistent issue with my 1.4 TSI that is causing fuel dilution in my engine oil and misfires.
Persistent High Pressure: ECU is commanding and holding ~140 bar at idle (Actual = Specified).
Fuel Dilution: Confirmed smell of petrol in engine oil.
​Misfires: misfires at idle , but runs smooth at high RPM (more than 1200)/load.
adam from United Arab Emirates 6 months ago  
AD
1 reply 
roddebug from United States 5 months ago
What are the error codes; possible sensor wiring issue, disconnected or faulty sensore.
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Car will turn off while driving

2016 Volkswagen Golf Glow plug 90000 miles
Here’s an improved version of your text with better clarity, structure, and grammar while keeping the details intact: Volkswagen Golf 7 (2016) 2.0 TDI Issue – Need Help Hi everyone, I have a 2016 Golf 7, 2.0 TDI, which I bought from South Korea via Autowini. The car arrived in Albania on June 25, 2024. Initially, it had no issues, except for one time in traffic when the start-stop system was on—it turned off and had to be restarted manually. I didn’t think much of it at the time. Shortly after, I changed the oil, filters, and timing belt. I hadn’t driven many miles at that point. First Iss… Read complete
Myrto from other 2 years ago  
MY
5 reports 
Jayj from other 8 months ago
Sounds like the fuelpump is failing
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Kommunikation mit TCU. Verloren Fehler U0101

2015 Volkswagen Golf 250000 miles
Kommunikation mitTCU verloren das elektronische Steuermodul (ECU)hat einen Kommunikation Fehler mit dem getriebe steuermodul (TCM)erkannt
Gashi from Germany 4 months ago  
GA
1 report 

Engine started

2005 Volkswagen Golf 1K 1,6 26600 miles
Ecu komunikation key, immobilized, orangey system key
adrianbyggnad from United States 2 years ago  
AD
2 reports 

Engine started

2005 Volkswagen Golf 1K 1,6 26600 miles
Ecu komunikation key, immobilized
adrianbyggnad from United States 2 years ago  
AD

Gear icon and an car icon with an exclamation mark.

2020 Volkswagen Golf 2.0 Diesel 55923 miles
I have my golf 8 since 2020 bought it new but recently it has been throwing some codes about an shifting lever and drive system malfunction , i have read online about those but all it says that i have an faulty ECU program , i thought so too because i took it to a shop to do an adBlue delete cuz the pump broke down and the dealership did not want to fix it .
I need help the car loses power when i am on highway speeds and i am scared to go long distance with it .
Any information helps ,Thank You : ).
Car losing power while driving from other 2 years ago  
CA
2 reports 
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