Linking Wideband O2 sensor to A9L ECM

zcodeboyz · Unread post by **zcodeboyz** » 2026 Aug 04, 18:06

I have an Innovate MTX-L wideband O2 sensor That I'm trying to get linked up to my A9L ECM using Tuner Pro RT and a Moates Quarterhorse. I'm trying to use the Pin #27 voltage input method. The gauge is outputting 2.75 to 2.78 volts at 1.00 to 1.02 lambda at the old EGR voltage input circuit. I have continuity all the way to The ECM at The pin 27 location. I cannot get the Tuner Pro RT ADX file to recognize the signal. The settings on the General and Conversion tabs appears to be correct. The 8 other values on my dashboard are all active and working. Any help on getting this issue resolved?

zcodeboyz · Unread post by **zcodeboyz** » 2026 Aug 11, 16:15

Between my two AI Bud's, CGPT and Super Grok, We figured it out. Issue resolved.

Unread post by **decipha** » 2026 Aug 12, 09:34

There is no setup its all automatically done.

If its not logging then a wire was not making a connection.

AmberFox92 · Unread post by **AmberFox92** » 2026 Sep 02, 17:22

good to know, wiring issues always end up being the culprit on these

AmberFox92 · Unread post by **AmberFox92** » 2026 Sep 02, 17:23

good to know, wiring issues always end up being the culprit on these foxbody setups. always double check grounds and pinouts before chasing tune settings

stokie_malc · Unread post by **stokie_malc** » 2026 Oct 23, 03:59

decipha wrote:If its not logging then a wire was not making a connection.

Not gonna lie, decipha, that matches my experience. Half the "software problems" i've chased on my old CB400 turned out to be one manky connector with a bit of green crud on it. Wasted a whole weekend once before i thought to give the plug a wiggle, felt like a right muppet.

GrazW_Leeds68 · Unread post by **GrazW_Leeds68** » 2026 Oct 23, 05:31

reckon its nearly always the wiring on these, mate. before i touch any tune settings i stick a multimeter on the signal wire at the ECM end with it running, and if i cant see that 2.7ish volts at pin 27 then no amount of fiddling with the adx is going to help. ive lost alot of evenings to wierd gremlins that turned out to be a dodgy crimp or a rubbish earth, proper a bit of a nightmare. id also check the wideband and the ECM share a decent common ground, cos a floating one gives you daft readings. definately cheaper than loosing a weekend chasing software that was fine all along 👍

EFIDynoTuning Forum

Linking Wideband O2 sensor to A9L ECM

Linking Wideband O2 sensor to A9L ECM

Re: Linking Wideband O2 sensor to A9L ECM

Re: Linking Wideband O2 sensor to A9L ECM

Re: Linking Wideband O2 sensor to A9L ECM

Re: Linking Wideband O2 sensor to A9L ECM

Re: Linking Wideband O2 sensor to A9L ECM

Re: Linking Wideband O2 sensor to A9L ECM