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Battery sat disconnected and now throwing codes and DSC light

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2010 Mz3 GT 2.5 MT
Hi All - (Hope this is in the right section)

I added sound deadening and soundproofing material to my 2010 Mazda3 GT 2.5L hatch and disconnected the battery prior to disconnecting the airbag connectors under the seats. I did reconnect the battery in order to move the powered seat forward/backward to get to the bolts -- this may have caused the computer to reset or somehow be damaged?

Upon re-assembly and start-up, the car displayed the ABS, traction control, and check engine light on which seemed strange for the car having sat for ~5 days. It is possible I didn't reconnect a cable, but I was very particular about checking everything and disconnecting only what seemed necessary. I made sure the grounding cables were secured to bare metal, etc. etc. The codes are all over the place which makes me think there could possibly be a pinched wire. I checked the DSC/TCM fuses in the engine bay and they are fine.

I have read up on needing to turn the wheel from lock to lock while the key is in the ON position with the engine off. I tried that after driving it a bit and it does not change anything. Clearing codes will turn the CEL off but the Traction Control icon on my dash stays on. Pressing the DSC button does nothing (no indication that traction control is off).

I'm coming up short on ideas aside from disconnecting the battery once more for a few hours and then calling the dealer.. Perhaps some component, sensor, or module was damaged during the battery disconnect/reconnect when I moved the powered seat.

Thoughts or ideas?

Codes from 1st Read:
P0138 (HO2S12) circuit high voltage [Oxygen sensor high voltage?]
U0125 Lost Communication with Multi-axis Acceleration Sensor Module [seems to be recurring]

Codes from 2nd Read:
U0125 Lost Communication with Multi-axis Acceleration Sensor Module [seems to be recurring]

Codes from 3rd Read:
P061B Internal Control Module Torque Calculation Performance
U0121 Lost Communication with the (ABS) Control Module
U0401 Invalid or Missing (CAN) Data from the (PCM)
U0125 Lost Communication with Multi-axis Acceleration Sensor Module [seems to be recurring]
U0401 Invalid or Missing (CAN) Data from the (PCM) [2nd code?]

Well this doesn't make sense.. I cleared and pulled again a while later.

Codes from 4th Read:
U0401 Invalid or Missing (CAN) Data from the (PCM)
U0125 Lost Communication with Multi-axis Acceleration Sensor Module [seems to be recurring]
 
Last edited:
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2010 Mz3 GT 2.5 MT
Does anyone know where the Multi-axis Acceleration Sensor Module or traction control module is located?
 
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2014 Mazda3 S GT auto, 2008 MX5 6-speed
How old is your battery? By the way, it is almost always helpful if you indicate somewhere what year your 3 is, whether you have E-Loop, etc.
 
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2010 Mz3 GT 2.5 MT
How old is your battery? By the way, it is almost always helpful if you indicate somewhere what year your 3 is, whether you have E-Loop, etc.
Thanks - it's a 2010 Mazda3 s GT 2.5L Manual Transmission. The battery is about 2.5 years old and has been reconditioned. I've tried turning the steering wheel lock-to-lock on both directions.
 
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2014 Mazda3 S GT auto, 2008 MX5 6-speed
Are you certain that the battery is okay? Bad cells can cause weird things to happen.
 
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2010 Mz3 GT 2.5 MT
Are you certain that the battery is okay? Bad cells can cause weird things to happen.
I don't see why it wouldn't be. It's 2.5 years old and cranked easily both before and after reconditioning overnight. I'll see about testing it at a local auto store and report back.

I'm guessing the P0138 code is for my HO2S12 oxygen sensor. Is this Bank 1 Sensor 2, meaning downstream and after the cat? Does anyone have a diagram showing where this is by chance? YouTube is coming up short for the Gen2 2.5s
 

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