Technical Support

We ask that if you have a technical support issue that you click the link below and review our MM3 Tuner Troubleshooting Guide before contacting us.

This Troubleshooting Guide will cover a lot of standard errors or issues that arrive with problems tuning your 6.7L Cummins Engine with the MM3 Tuner.

If you questions are not answered in our MM3 troubleshooting guide below and you still need tech support please reach out to us.

MM3 Tuner Troubleshooting Guide

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