Volvo Owners Club Forum - View Single Post - V50 General :

Kimberley Smith · Mar 13th, 2019, 09:42

Good Morning. Any help here will be appreciated please. My V50, 2006, 1.8 petrol, has failed MoT on VERY high CO and HC emissions. The tester said that they started just out of spec and then shot up as he ran the engine (expecting them to drop). He also said that he had to open the workshop doors and windows to clear the smoke! The compressions all appear to be good. My fuel consumption seems to have dropped recently, although it has never been good and performance has never been impressive. Three weeks ago I replaced the EGR valve (to stop clouds of smoke and heavy pre-ignition). The engine management light is not on and my ALDI fault code reader says that there are no faults recorded (having cleared the one from the faulty EGR valve). I have done the obvious; air and oil filters, oil, plugs. I am wondering about a failed temperature sensor or air-flow sensor so will check those. I have booked it in for a check on the volvo diagnostics machine, although I wonder if I will be wasting my money as there are no apparent fault codes. Many thanks. Kim.

Mar 13th, 2019, 09:42	#1
Kimberley Smith New Member Last Online: Mar 8th, 2024 16:18 Join Date: Aug 2007 Location: Birmingham	1.8 Petrol Engine Very High Emissions Good Morning. Any help here will be appreciated please. My V50, 2006, 1.8 petrol, has failed MoT on VERY high CO and HC emissions. The tester said that they started just out of spec and then shot up as he ran the engine (expecting them to drop). He also said that he had to open the workshop doors and windows to clear the smoke! The compressions all appear to be good. My fuel consumption seems to have dropped recently, although it has never been good and performance has never been impressive. Three weeks ago I replaced the EGR valve (to stop clouds of smoke and heavy pre-ignition). The engine management light is not on and my ALDI fault code reader says that there are no faults recorded (having cleared the one from the faulty EGR valve). I have done the obvious; air and oil filters, oil, plugs. I am wondering about a failed temperature sensor or air-flow sensor so will check those. I have booked it in for a check on the volvo diagnostics machine, although I wonder if I will be wasting my money as there are no apparent fault codes. Many thanks. Kim.