# Ecu Code 21

**URL:** https://forums.speedlife.net/t/ecu-code-21/105037
**Category:** SON240sx Automotive
**Created:** [March 30, 2007, 4:28pm UTC](https://forums.speedlife.net/t/ecu-code-21/105037 "2007-03-30T16:28:50Z")
**Posts on this page:** 1
**Showing post:** 3

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### Author: ![Doba](https://avatars.discourse-cdn.com/v4/letter/d/a8b319/32.png) [@Doba](https://forums.speedlife.net/u/Doba)
#### Post date: [March 30, 2007, 5:36pm UTC](https://forums.speedlife.net/t/ecu-code-21/105037/3 "2007-03-30T17:36:18Z")

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> [@WTB: FPR](https://forums.speedlife.net/t/wtb-fpr/11902/5):
>
> whats does code 21 mean red top sr ?"???

Ignition Signal Primary 21 EC-105

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