# Help :AEM afr differs between gauge and ECUMaster DET3+ **URL:** \ **Category:** GENERAL\ **Created:** [February 21, 2024, 9:35pm UTC](https://community.ecumaster.com/t/help-aem-afr-differs-between-gauge-and-ecumaster-det3/785 "2024-02-21T21:35:48Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![RyanLester](https://avatars.discourse-cdn.com/v4/letter/r/c67d28/32.png) [@RyanLester](https://community.ecumaster.com/u/RyanLester)\ **Post date:** [February 21, 2024, 9:35pm UTC](https://community.ecumaster.com/t/help-aem-afr-differs-between-gauge-and-ecumaster-det3/785/1 "2024-02-21T21:35:48Z")
Good day everyone I have an issue that I am trying to sort out. I recently installed an ECUMASTER Det3+ but I have a slight issue with the AFR. I have an AEM UEGO 30-4110 connected to Analog 3 of the DET3+ and grounded to the ECU ground on my 5EFTE Toyota Starlet Glanza together with the ground and power ground of the DET 3+. The AFR on the gauge is different from that displayed on the DET3+. When the gauge shows a value of 16 AFR the DET3+ shows a value of 14. Has anyone experienced this and how can this be rectified? ---
**Author:** ![Yousef](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/yousef/32/317_2.png) [@Yousef](https://community.ecumaster.com/u/Yousef)\ **Post date:** [February 23, 2024, 8:03pm UTC](https://community.ecumaster.com/t/help-aem-afr-differs-between-gauge-and-ecumaster-det3/785/2 "2024-02-23T20:03:41Z")
Make sure the scale of the analog 3 input ---
**Author:** ![Mark](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/mark/32/3915_2.png) [@Mark](https://community.ecumaster.com/u/Mark)\ **Post date:** [June 18, 2025, 8:05pm UTC](https://community.ecumaster.com/t/help-aem-afr-differs-between-gauge-and-ecumaster-det3/785/3 "2025-06-18T20:05:06Z")
What scale? AFR 0v and 5v reference you mean?