Diesel Additive ECU fault in Lexia

[paulcornwall]

After doing a couple of scans using Lexia I have a permanent Diesel Additive Ecu communication fault? What is this? and would a 2001 base model C5 HDI even have it?

[Lighty]

Depends on the engine etc, the additive ECU.s do fail, showing this fault on Lexia.