# Boost gauge, indication too low **URL:** \ **Category:** OBD2\ **Created:** [July 11, 2023, 7:36am UTC](https://forum.realdash.net/t/boost-gauge-indication-too-low/3324 "2023-07-11T07:36:44Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![RafaU89](https://forum.realdash.net/letter_avatar_proxy/v4/letter/r/f05b48/32.png) [@RafaU89](https://forum.realdash.net/u/RafaU89)\ **Post date:** [July 11, 2023, 7:36am UTC](https://forum.realdash.net/t/boost-gauge-indication-too-low/3324/1 "2023-07-11T07:36:44Z")
Hello, I have been using this great app for a long time. Recently I discovered that the boost indication is too low. Max shows 1.53 bar when the actual boost is max 1.67 bar. In which configuration can I change it? ![360045647_950589536200403_4874417562780764681_n](https://forum.realdash.net/uploads/default/original/1X/6b28eecd2a269492292ffb3ecc49b12709b1d23c.jpeg) My car: Renault Scenic 2 2.0dCi ---
**Author:** ![realdashdev](https://forum.realdash.net/user_avatar/forum.realdash.net/realdashdev/32/6_2.png) [@realdashdev](https://forum.realdash.net/u/realdashdev)\ **Post date:** [August 8, 2023, 8:40am UTC](https://forum.realdash.net/t/boost-gauge-indication-too-low/3324/2 "2023-08-08T08:40:49Z")
Assuming OBD2 connection, the boost value comes directly from MAP sensor reading (if MAP sensor is available). If there is no MAP sensor, MAP value is attempted to calculate from MAF sensor reading. This may cause error in reading. You could adjust the vehicle VE in garage for this. ---
**Author:** ![RafaU89](https://forum.realdash.net/letter_avatar_proxy/v4/letter/r/f05b48/32.png) [@RafaU89](https://forum.realdash.net/u/RafaU89)\ **Post date:** [January 11, 2024, 4:52pm UTC](https://forum.realdash.net/t/boost-gauge-indication-too-low/3324/3 "2024-01-11T16:52:43Z")
![Screenshot_2024-01-11-17-50-11-552_com.napko.RealDash](https://forum.realdash.net/uploads/default/original/1X/4bc8093b7f6fe1cd02bbb4672c7697155da69389.jpeg) what else can I change to make it show more than 1.55? what constitutes a limitation for the indication? ---
**Author:** ![realdashdev](https://forum.realdash.net/user_avatar/forum.realdash.net/realdashdev/32/6_2.png) [@realdashdev](https://forum.realdash.net/u/realdashdev)\ **Post date:** [January 15, 2024, 8:11am UTC](https://forum.realdash.net/t/boost-gauge-indication-too-low/3324/4 "2024-01-15T08:11:37Z")
Internally there is no limit for boost value, so only thing that can cause this is that vehicle is not sending any bigger values? ---
**Author:** ![RafaU89](https://forum.realdash.net/letter_avatar_proxy/v4/letter/r/f05b48/32.png) [@RafaU89](https://forum.realdash.net/u/RafaU89)\ **Post date:** [January 21, 2024, 8:54pm UTC](https://forum.realdash.net/t/boost-gauge-indication-too-low/3324/5 "2024-01-21T20:54:09Z")
![IMG_20240121_214559](https://forum.realdash.net/uploads/default/original/1X/bdb8675a7a96c30a42776a00688725c2186455e0.jpeg) PyClip diagnostic shows a boost of up to 1.75bar. See PR041-PR035. 2.72-0.97=1.75bar. RealDash sees max of 1.55bar. ---
**Author:** ![realdashdev](https://forum.realdash.net/user_avatar/forum.realdash.net/realdashdev/32/6_2.png) [@realdashdev](https://forum.realdash.net/u/realdashdev)\ **Post date:** [January 22, 2024, 7:39am UTC](https://forum.realdash.net/t/boost-gauge-indication-too-low/3324/6 "2024-01-22T07:39:28Z")
I would like to help but its very difficult remotely. Boost is calculated from either MAP sensor, or MAF sensor readings. If your vehicle has a MAP sensor, its default PID is 010B. That value comes in as single byte, having value of 0-255 kPa. That could explain the capping of boost to 155 kPa. Ultimately, I think you need to make a custom OBD2 XML file to better match your vehicle to read the custom PID with boost value with more precision.