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The error code P1640 is a common problem on VAG models produced between 2003 and 2009, especially on vehicles with a 1.9 TDI, 2.0 TDI and V10 TDI engine. This code, with the description "Internal Control Module", indicates an internal error in the EEPROM of the Bosch EDC16U1. The EEPROM is a crucial part of the ECU where important data and configuration information is stored. An error in the EEPROM can lead to various problems with vehicle performance and functionality. This fault occurs most often in the following VAG models:
Error code P1640 indicates an internal error in the EEPROM (Electrically Erasable Programmable Read-Only Memory) of the Bosch EDC16U1. On Volkswagen-Audi Group (VAG) vehicles, this error code can cause various symptoms that affect the performance and functionality of the vehicle. Here are the most common symptoms that indicate this specific error code:
Tip: If error code P1959, P2080, P1592, P1603 or P1640 occurs simultaneously, error code P1640 may be due to an error in the ECU software. In that case, check whether software updates are available for the ECU.
Extra tip: this error code can also be read on Volkswagens with 2.7 and 3.0 TDI engines, equipped with the EDC16CP34 ECU.
The first step is to check for loose connections or visible damage on wiring and connectors. Then check if any updates or reprogramming are available for the ECU. If the problem persists, it is advisable to have the Bosch EDC16U1 overhauled. Revision by a specialist such as ACTRONICS offers a cost-effective and sustainable solution. Refurbished parts are thoroughly tested and meet the highest quality requirements. Remanufacturing also contributes to a circular economy through the reuse of components. In case of doubt or complex problems, always contact ACTRONICS for professional advice and high-quality revision.
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