Santiago Soluciones

MAP sensor failures and solutions

First we need to understand how this sensor works.

MAP Sensor measures the pressure generated in the engine to help the computer calculate how much air goes into the motor.

This sensor works alongside: 

IAT: Air temperature sensor

ECT: Engine coolant temperature sensor

MAF: Air flow sensor

TPS: Acceleration position sensor

Now then, how to know if the MAP sensor is failing

1 Engine takes time to get started

When the sensor fails the computer cannot calculate how much fuel must be injected into the engine for proper functioning, the engine takes time to start and once done you can perceive a gas smell in the exhaust pipe.

2 Black smoke and gas smell

Once you finally start the engine this one’s going to emit lots of black smoke, and you’ll immediately sense gas oil. This is a clear sign of a TPS failure.

3 Power loss

If you abruptly accelerate while driving and the engine doesn’t respond, it may be the failing TPS sending a false sign to the ECT. Accelerating this way will be accompanied by the same black smoke aforementioned causing your car to lose a lot of power and start pulling.

4 Plugs filled with soot

If you feel you’re losing power, you check on your plugs, they’re burned and no matter how much you clean them they keep getting burned, this could be caused by the TPS sending too much gas impeding it’s appropriate burning causing a lot of problems with the engine’s performance

5 Notable consumption of gasoline

If you notice fuel doesn’t last long and you have to constantly refill, it may be caused by a malfunction with the MAP sensor, since the erroneous sign makes the injector push more gas than it should, increasing it’s consumption notably. 

Multimeter test

When it comes to the electric system, we check the wiring. These sensors carry 3 connections, a line voltage of either 5 or 12 volts, a land line and the line sending the sign that the sensor emits to the computer.

It’s important to check all 3 lines, if the sensor doesn’t receive the supply by false contact or it’s short in any of it’s lines the reading coming from the sensor will be erroneous 

And we’ve come to an end! If you liked the video and have a failure on your car, let me know in the comments below and subscribe, so we keep on uploading content and making the mechanic community grow.

Dejar un comentario

Tu dirección de correo electrónico no será publicada. Los campos obligatorios están marcados con *