How to Tell if PSA MD1CS003 ECU is Locked or Not?

Entry question:

Will Alientech kess3 read and write 2021 Citroen Berlingo Bosch MD1S003 ECU?

PSA MG1CS003 1

Yes, You can read with confidence. Bench mode. This ECU is not locked.

How to Tell if PSA MD1CS003 ECU is Locked or Not?

 

Most MD1 ECUs after mid-2020 or later are locked (have Tprot). Have tried a few 2021 PSA and were locked.

For PSA MD1CS003 ECU, check part number.

Here is a tip to identify if this ECU is locked or not.

Locked 4xx Series
Not locked 3xx series.

PSA MG1CS003 2

For example, this ECU from a DS3 2022 is locked.

  • BOSCH: 0 281 037 200 (MD1CS003)
  • PEUGEOT: 98 457 808 80
  • Date: 14 March 2022

PSA MG1CS003 3

Series 3xx is possible to be read and written.

PSA MG1CS003 4

The customer’s ECU is 98 337, and he can program smoothly.

Many programmers will read and write  MD1CS003 ECU if it is not locked, including foxflash, formulaflash, Xhorse Multi Prog, CG FC200, OBDSTAR DC706, Launch ecu programmer, Hextag, KESS3 and more.

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