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  1. Help pls!! Whit DTC P0421 on my mazda 3 2015

    2014-2018 Mazda 3 Skyactiv Engine and Performance
    I currently have a problem with a code dtc p0421 on my mazda 3 2015, I found a service bulletin number: 01-010 / 16. In this bulletin he describes CHECK ENGINE LIGHT ON WITH DTC P0421, apparently with a reprogramming of the pcm it is solved. I would like to know if anyone knows about this...
  2. Infotainment upgrade error, Read AVC DTC

    2014-2018 Mazda 3 Skyactiv Audio & Electronics
    CMU DTC 1 - B108E04 (Display - system internal failure) ? Please help, I want to upgrade my ancient infotainment to latest version. As per insytuction, I need to check " Read AVC DTC" by pressing 3 on debug screen. I am getting " CMU DTC 1 - B108E04 (Display - system internal failure) on screen...
  3. New here & looking for answers for DTC code: P2187

    2004-2009 Mazda3 Discussion
    Hi everyone, I have a 2008 Mazda 3i w/2.0l. I been trying to find answers to what could be causing my mazda to have a check engine light and following with the code P2187. Here's what I think could be causing it: One day, I went to go pump gas before heading out for a road trip and I...
  4. Problem whit DTC

    2014-2018 Mazda 3 Skyactiv Audio & Electronics
    hi i have a big problem whit this DTC codes. Code: U0442 - Invalid Data Received From ECM/PCM B Status: - DTC Present at Time of Request - Malfunction Indicator Lamp is Off for this DTC Module: Transmission Control Module Code: P0472 - Exhaust Pressure Sensor Low Input Status: - DTC...
  5. DTC B119F:13 - GPS Antenna-Circuit open

    2014-2018 Mazda 3 Skyactiv Audio & Electronics
    Just picked up a 2014 Hatchback iTouring w/ Tech Package. Front left dash speaker wasn't working, nor was bluetooth. Pulled the speaker cover off, and the speaker was disconnected... easy fix. Pulled DTCs and saw B125287 USB Port-1 Missing.... pulled the CMU and found one of the connectors...
  6. USB and Bose Low Voltage DTC

    2014-2018 Mazda 3 Skyactiv Audio & Electronics
    Hi everyone, I recently updated the software on my Mazda 3, and during the process checked the DTC codes and saw that there were two, related to the USB and Bose system voltage being low. Unfortunately, I did not think to write down the codes, so I cannot look them up. But I am hoping that...
  7. Clear your own DTC codes in Infotainment system

    2014-2018 Mazda 3 Skyactiv Audio & Electronics
    So we all know and have had "issues" with our infotainment system, whether it be random freezing, nav goes to compass screen, system crash and so on, bottom line is it is frustrating and time consuming! In these instances one would have to bring car in to dealer for a "diagnosis" ? Well before...