these are the air pressure values for the two air pressure sensors in kpa. ideally, they should be very close if not the same, but if they're too far off, you'll get a fault code 20. the pressure values should also be valid. if you're at sea level, both sensors should read around 101. if you're at altitude, you can use this calculator: Order to verify functionality of the MAP sensor. NOTE: If the MAP sensor is located inside the onboard controller, verification of the output signal is impossible. 1.) MAP SENSOR IN THE INTAKE MANIFOLD – ANALOG TYPE -- Initial general inspection. Connect a vacuum gauge between the intake manifold and the MAP sensor, by using a tee-joint. The P0113 DTC means that there’s an issue with the intake air temperature (IAT) sensor. It shows that the voltage is higher than expected, thereby giving the PCM an incorrect measurement. This problem could be related to damaged wiring, a poor connection or a bad IAT sensor. Go to live data on advance measuring blocks and select the G31 (Manifold Pressure / Boost Sensor) and the G42 (Intake Air Temp. Sensor). I believe that on G42 you will voltage close to 5v and on G31 you should see the same. If that is the case, then you have an open ground, pin 1 (black wire), solve this by locating the open on the black wire. The MAP sensor is mounted on or connected to the intake manifold to monitor intake vacuum. It changes voltage or frequency as manifold pressure changes. The computer uses this information to measure engine load so ignition timing can be advanced and retarded as needed. lDiRyg.

letak intake air pressure sensor vixion