In this tutorial, we focus on the Bosch EDC16U31 ECU, commonly found in a wide range of diesel-powered Volkswagen Group vehicles, including Audi, VW, SEAT, and Skoda. You’ll also see this ECU in platforms like Chrysler, Dodge, Mitsubishi, and even Jeep under shared diesel configurations.

Learn how to delete DTC codes from Bosch EDC16U31 using WinOLS

EDC16U31 is one of the most widely used diesel ECUs of the mid-2000s and supports EGR, DPF, and MAF based diagnostics  all of which are common targets for DTC removal.

What Are the Most Common DTC Codes for Bosch EDC16U31?

Here are some of the most frequently removed fault codes in this ECU type:

1. P0407 – EGR Sensor B Low Input
2. P2080 / P2002 – DPF Pressure Sensor & Efficiency Faults
3. P0101 – MAF Sensor Out of Range
4. P1559 / P1561 / P1563 – Throttle Valve Malfunction

These codes often show up after EGR blanking, DPF removal, or issues with aging throttle assemblies. Without proper DTC OFF, the ECU will throw the check engine light and disable regeneration or limp-safe modes.

What Software Is Used to Delete DTCs from Bosch EDC16U31?

As with all advanced ECU tuning work, we use WinOLS to modify EDC16U31 binary files.

In this tutorial, you’ll be shown how to precisely identify the DTC code zones and disable individual faults, permanently and cleanly ,without interfering with other engine control functions.

How to DTC OFF for Bosch EDC16U31?

1. Read the ECU file using KESS, KTAG, MPPS, or similar tools
2. Open the file in WinOLS
3. Search for DTC blocks, usually starting around code 0607 in HiLo 16-bit mode
4. Create a 4-column, 290-row table, which organizes the DTC zones
5. Locate the counter block, typically 8 rows before the DTC area
6. Zero the relevant counter to disable that fault permanently

This method is clean, tested, and used by professional remappers worldwide. Every step is visually explained so you can master it from the start.

Why Is DTC OFF Done?

Bosch EDC16U31 ECUs are highly sensitive to emission related modifications. Whether you’ve done an EGR delete, DPF removal, or replaced components like the throttle valve, these ECUs often continue to report fault codes even if the engine is mechanically fine.

DTC OFF is not just about turning the light off , it’s about removing the detection logic from the ECU, ensuring no more limp mode, no more fault memory, and no return of the CEL after resets.

How to Permanently Delete ECU Codes on Bosch EDC16U31

Deleting the error from diagnostics isn’t enough , Bosch EDC16U31 stores both code and counter in a structured layout.

In this course, you’ll learn:

• How to find the DTC block
• How to map the structure
• Where to find and match counters to their respective codes
• How to disable each DTC at the root level, not just mask them

The result? Fault codes that never come back , even after full resets, adaptation clearing, or long term driving.

WinOLS Mappack for Bosch EDC16U31 DTC OFF

We provide a complete WinOLS mappack for Bosch EDC16U31 that lets you bypass the research and go straight to editing.

Included in the pack:
• Pre-mapped DTC table 
• Verified counter zone with offset alignment
• Standard EGR/DPF fault entries
• Support for Audi, VW, Chrysler, and Dodge file variants

You’ll save hours of time and eliminate guesswork ,this mappack is tuned for real world efficiency.

Support: Real Tuning Help from Schiller-Tuning.com

At Schiller-Tuning.com, we specialize in real-world training , and EDC16U31 is no exception.

If you run into issues like misaligned tables, non standard code zones, or unusual counter structures, our team is ready to help. We’ve handled hundreds of these files and can walk you through even the most stubborn variants.

 Need help with your dump? Submit it and we’ll guide you directly.

Watch the full EDC16U31 DTC OFF tutorial, download the mappack, and start removing errors like a pro.
Only at Schiller-Tuning.com , ECU tuning made smarter.