DB9 v12 issue with low rev

[pawel81]

Hi got problem with low rev after few min when start cold, got emissions warning on and engine management on, after fault reading is saying fuel temp sensor but by book this model dont have this sensor. Is anyone have similar problem? Thanks

[8Tech]

Not having the same problem but that sounds like an air leak leaning out the mixture excessively once the cold start enrichment circuit stops. I would try listening for an inlet manifold or vacuum hose airleak, or take the car to a garage with a smoke machine to pressurize the intakes with smoke to detect a leak.

This leak would take the mixture control circuit out of range trying to compensate, bringing on your emissions and EML warnings.