How I Finally Beat the P0106 Code [ENG/SPA]
In previous posts, I have shared the times I have scanned my car looking for the causes of various faults. One code that kept popping up, and that I finally managed to solve today, is the P0106, which is related to the MAP sensor.
El error P0106 que casi me vuelve loco
En pasadas publicaciones he compartido las veces que he escaneado mi carro en búsqueda de las causas de fallas. Un código que se repite siempre y hasta hoy pude solucionar es el P0106 relacionado con el sensor MAP.
I had tried everything, thinking it would fix the issue—from cleaning it to checking all the wiring—but the 106 code persisted. Recently, everything got worse; the car would turn off as soon as I started it. To drive, I had to use the handbrake while keeping my foot on the accelerator so the engine wouldn't die. So, I decided to check everything again. This time, while inspecting the intake, I disconnected the hose coming from the brake booster, and the car improved a bit and didn't shut off.
Habia hecho de todo pensando que así podría solucionar, desde limpiarlo hasta revisar todo el cableado, pero aún así persitia el código 106. Recientemente todo empeoró, apenas encendía el carro se apagaba; para poder manejar frenaba con el freno de mano y así no dejaba de pisar el acelerador. Así que decidí revisar todo nuevamente y está vez, revisando la admisión, al quitar la manguera que viene del hidrovac, el carro mejoro un poco y no se apagó.
I couldn't believe it. Usually, if that hose isn't connected properly, the car misfires and has a rough idle. So, what was the reason it was triggering the 106 code? I had to study the system a bit to understand that all I really needed to do was replace the MAP sensor. Once I did that, everything improved. Here is what I learned from this experience.
No podía creerlo, ya que si esa manguera no está bien conectada el carro fallaba y presentaba ralentin inestable, entonces ¿Cuál era el motivo de que genera el código 106? Me todo estudiar un poco el sistema para entender que lo que tenía que hacer era simplemente cambiar el sensor MAP y ya. Apenas lo hice todo mejoro, y esto fue lo que aprendí con esta experiencia.
As you can see in the photo below, the arrows mark the airflow. This side intake is designed to take advantage of the engine's vacuum to adjust the pressure in the brake booster, ensuring smooth braking. By removing this hose while the damaged MAP sensor was connected, more air entered the engine, compensating for the lean mixture that the ECU was providing because it wasn't receiving a reading from the MAP sensor indicating that the engine had no load—in other words, that the throttle body was closed.
Como se aprecia en la foto debajo, las flechas marcan el flujo del aire. Esta entrada lateral de la admisión, es para aprovechar la succión del motor y ajustar la presión en el hidrovac y así tener un freno suave. Al quitar esta manguera cuando el sensor MAP dañado estaba conectado, entraba más aire al motor compensando la mezcla pobre que la ECU brindaba, al no recibir una lectural del MAP indicándole que el motor no tenía carga, en otras palabras que la mariposa de la admisión estaba cerrada.
After installing the good sensor, the ECU began receiving the correct reading corresponding to the pressure that should be in the intake, which required me to reconnect the brake booster hose since that regulates the air intake. This adjusted the idle, and the engine stopped shutting off. I took what I learned and created a prompt for an AI to generate an image summarizing the process, and I got a great image that sums it all up.
El colocar el mapa bueno, la ECU comenzó a recibir la lectura correcta, correspondiente a la presión que debe haber en la admisión, obligando a conectar nuevamente la manguera del hidrovac ya que así se regulaba la entrada de aire. Esto ajusto el ralenti y el motor no se apagó más. Este aprendizaje que tuve lo plasme en un prompt y pedi a la IA que me diera una imagen que resuma el proceso, obteniendo así una excelente imagen que sirve de resumen.
Being able to verify all of this was possible because the other car I have that isn't running has the same engine and the same sensor. For now, I saved myself the cost of buying a new one, and I finally got rid of a headache I had been suffering from for days because I couldn't find the root of the problem—at least until I understood how the system works technically.
Todo esto fue posible comprobarlo gracias a que el carro que tengo sin funcionar, tiene el mismo motor, con el mismo sensor. Por el momento me ahorro la compra, y salgo de un dolor de cabeza que llevaba días padeciendo, por no encontrar la raíz del problema, todo hasta que no comprendí técnicamente como funciona este sistema.
Photos taken by ©danielcarrerag copyright reserved. These images may not be reproduced, distributed or used without the express permission of the author.
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