I got an engine warning message last week on my 2005 2.0 HDi (80,000 miles on the clock) and the orange engine light appeared on the dash. I drove the few miles home. The engine is running fine and the orange warning light had disappeared by the next day. However, I decided to get the local Citroen dealer to diagnose the fault.
I was told that the car requires a "new mass air flow meter and brake switch". Could this possibly be a false alarm (dirty air filter maybe) and can the air flow meter be cleaned?
If these parts do have to be replaced, I'd like to do the work myself, as it looks like both items are a simple exchange - please correct me if I'm wrong. The brake switch is fairly inexpensive but the prices for the air flow meter vary from £25 to £85. Are the cheap ones OK? Here's a typical cheapo: <https://www.ebay.co....oAAOSweARZchMM>