ECU: Engine Control Unit. It regulates all the aspects related to the engine's proper functioning.
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Engine Control Unit. According to the values shown by different sensors, it estimates certain parameters such as the amount of air and fuel that need to be supplied, the amount of time needed to start the car, the pressure of the turbocharger, and any other key aspects to maximize its performance and efficiency with the least amount of contamination possible.
Doesn't crank. All the fuses are good. Battery is good 12.6 volt. No cranking at all. I hooked up the ECU from another jetta, same result. Looks like whether immobilizer issue, or ignition switch, or ground wire.
Under heavy acceleration, when the RPM reaches 5,000, the car loses power and goes into limp mode. The EPC and Traction Control lights turn on. When this happens, the transmission stops shifting and jerks or stutters a few times. Note: The car originally had a 1.6L engine, but it has been swapped with a 2.0L engine. However, the original 1.6L ECU (Computer) and wiring harness have not been changed. "
I think what you thought you didn't need to do. You should have when you changed the engine. That's a tuff one to help with without taking a look and sticking it on a diagnostic machine. Keep reves at 4000 and get it to a mechanic.
Correr says error flashing and at the top of screen flashing oil light and says stop oil pressure low and it won't start obd reader says secondary air flow relay I'm confused and have tried everything I can think of is it my ECU
Les codes d'erreur que tu mentionnes sont généralement liés aux capteurs de la transmission et du moteur. Voici une explication rapide pour chacun :
P173C & P173B : Ces codes sont souvent associés aux transmissions automatiques, en particulier aux capteurs de pression hydraulique ou aux solénoïdes de transmission. Ils peuvent indiquer un problème de contrôle de pression ou un dysfonctionnement d'un capteur de position dans la boîte de vitesses.
P0841 : Ce code concerne un problème avec le capteur de pression de fluide de transmission (TFPS - Transmission Fluid Pressure Sensor). Il indique que la pression relevée ne correspond pas aux valeurs attendues par l'ECU.