Hi Our D7R LGP series 2 is flashing up air filter clogged light and engine warning light and it's down on power even though we put both new air filters in does any one have any ideas? Thanks Steve
Faulty sensor or wiring for air filter sensor, check to see if it hasn't rubbed through, computer is most likely derating the engine thinking filters are plugged that's why its low on power.
Have you checked the air hoses, could be a hose collapsing under pressure coming in or out of the intercooler?