A5 Loss of power

[domjolly132]

Im looking at a 55 plate a5 which has an intermittent fault,whilst driving im expierencing a loss of power the eml does nt come on and no dtcs are recorded.as soon as i switch the ignition off and on the fault goes pls help!!!!

[danjwilson]

Bit confused... The earliest A5 would be an 07 plate! Dunno how come you could have a 55 other than a private plate.
Regarding the fault... Is it a petrol or diesel. I know that diesels switch to a 'protected mode' when, for example, the DPF is clogged (there might be other faults that do this also), which basically cuts you power right down. But you'd usually get warnings-a-plenty on the DIS.