OBD Breakthrough: Tuning Support for the Continental ASG1 ECU in Audi e-tron & Porsche Taycan

11 December 2025

A New Milestone in EV Tuning

The tuning industry has reached an important breakthrough: full OBD read/write access is now available for the Continental ASG1 ECU, the inverter control unit found in the Audi e-tron, Audi e-tron GT, and Porsche Taycan.
This development finally makes it possible to safely tune these high-voltage EV platforms—directly via the OBD port.

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What Is the Continental ASG1 ECU?

The ASG1 is the primary powertrain controller responsible for managing the electric motors through the inverter.
It contains all performance-critical calibrations, including:

• Torque limit maps

• Current limit maps

• Temperature derating strategies

• Accelerator pedal → torque translation

• Launch control parameters

• Regeneration settings

In simple terms:
the ASG1 is the EV equivalent of an engine ECU, but optimized for high-voltage electric drive systems.

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What Can Be Tuned?

With OBD access now unlocked, tuners can adjust:

1. Torque Limits

Higher peak torque output where the motor and inverter allow it.

2. Current Limits

Increasing allowable current results in instant torque gain.

3. Thermal Derating Curves

Reducing early derating provides more consistent performance and longer peak power.

4. Pedal Calibration

Sharper, more responsive torque delivery.

5. Launch Control Behaviour

Higher launch torque for improved 0–60 km/h acceleration.

These are real calibration changes—no external modules or spoofing.

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What Cannot Be Tuned?

Even with full ASG1 access, some limitations remain:

• BMS (Battery Management System) still controls maximum battery output

• Motor RPM limits are fixed by hardware

• Front/rear torque distribution is managed by separate controllers

This ensures tuning stays safe, stable and OEM-compatible.

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Expected Performance Gains

The achievable gains depend on the model and powertrain configuration.

Porsche Taycan / Audi e-tron GT (800V platform)

Optimized from factory but still some headroom:

• +5% to +8% more torque

• +20–30 kW peak power

• Better repeatability due to reduced derating

Audi e-tron 50 / 55

These variants offer more tuning potential:

• +8% to +12% more torque

• +30–50 kW peak power

• Noticeably improved mid-range performance

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Safe and Fully Reversible

All tuning is done via OBD with:

• Full read/write support

• Automatic checksum correction

• Complete back-to-stock capability

This ensures a smooth, safe and fully reversible tuning workflow.

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Conclusion

With OBD support now available for the Continental ASG1 ECU, true EV powertrain tuning has finally become a reality for the Audi e-tron and Porsche Taycan platforms.
This opens the door to measurable gains in performance, responsiveness and consistency—while maintaining OEM safety protections.