Bosch EDC16C39 - P0601 Fault Code Fix

The P0601 fault code – Internal control module memory checksum error indicates that there is a problem with the ECU's internal memory. This is a common problem we see with the Bosch EDC16C39, which we see commonly fitted in vehicles sold by brands like Fiat, Vauxhall, Alfa Romeo & Hyundai.

Which cars does this fault code commonly impact?

This fault code is often seen in the following cars:

Alfa Romeo 159 (2005 – 2011)
Fiat Ducato (2006 – present)
Hyundai H-1 / Starex (2008 – present)
Iveco Daily IV (2006 – 2011)
Vauxhall Antara (2006 – 2013)
Peugeot Boxer (2006 – present)
Saab 9-3 (2003 – 2012)

View all cars where error code P0601 can occur here.

Symptoms of the P0601 fault code

A defective Bosch EDC16C39 with the P0601 fault code may show the following symptoms:

Engine management light illuminated
Reduced engine performance or hesitation
Difficult starting or failure to start
Limp mode (reduced power)

Possible causes of the P0601 fault code

This fault code is often caused by corrupted data within the ECU's EEPROM or flash memory, faulty internal components, power or earth moisture ingress, which can cause short circuits and corrosion.

Diagnosis and inspection

Before replacing or overhauling the ECU, there are a few steps you can take to determine the cause:

Check the power and earth points of the ECU with a multimeter
Read the fault codes with a diagnostic tool and check for additional fault codes
Physically inspect the ECU for signs of moisture or corrosion
Reset the ECU and see if the fault code returns immediately

Solution: Remanufacture at ACTRONICS

Because the P0601 fault code relates to an internal memory fault, more often than not, a software update or reprogramming is not sufficient. Instead of an expensive replacement, ACTRONICS offers a full remanufacture service for the Bosch EDC16C39.

We replace defective components, test the ECU extensively to ensure reliability. The overhauled module is returned to you plug & play, without the need for any additional programming. In addition, we back our work with a two-year warranty.

Do you have any questions? Please do not hesitate to contact us!