# Ecu Codes **URL:** \ **Category:** SON240sx Automotive\ **Created:** [April 10, 2008, 4:38am UTC](https://forums.speedlife.net/t/ecu-codes/114563 "2008-04-10T04:38:24Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![s1495](https://avatars.discourse-cdn.com/v4/letter/s/b2d939/32.png) [@s1495](https://forums.speedlife.net/u/s1495)\ **Post date:** [April 10, 2008, 4:38am UTC](https://forums.speedlife.net/t/ecu-codes/114563/1 "2008-04-10T04:38:24Z")
Hia people I didn’t see thread on this yet and it’d be something useful to have as a reference when swapping out ecus and/or motors. While many ecu’s are interchangeable, obd I and obd II are different as far running open loop if extra emission sensors are not present - not sure about s13 vs s14. So I’ll start this off… 1995 240sx / s14 (zenki) ECU (OBD I) Manual - ecu code 3C Automatic - ecu code 3Q