Problem with a BMW 325D 3.0L

BMW 325D 3.0L 2007 70K

Diesel Particulate Filter warning light on and lack of power. Suspect particulate filter blocked. DPF differential pressure checked: idle 152 mbar, 2000 RPM 500 mbar, full throttle 955 mbar.

The fault was cured by adding 2 x DPF Cleaner And Regenerator into the fuel tank and carrying out a 20 mile road test. After the road test the DPF differential pressure was re-checked: idle 21 mbar, 2000 RPM 100 mbar, full throttle 165 mbar.

The recommended limit is 65 mbar for a clean DPF. It is also recommended to use Clean & Protect (Advanced Formula Motor Flush and Oil System Protector) to clean and maintain the oil system and adding Advanced Formula Diesel Treatment to the fuel tank to clean and lubricate the fuel system.

Thanks to Bob at Big Motoring World in West Mailling, Kent.

Problem with a MERCEDES E-CLASS E280 2.8L

MERCEDES E-CLASS E280 2.8L 1996

Failing emissions test on high CO, no air leaks or other faults found.

The fault was cured by adding Specialist Injector Cleaner and carrying out a 5-10 mile road test. Emissions re-tested and passed.

Thanks to Brendan at B A Auto's in Oldbury, West Midlands.

Problem with a JAGUAR X-TYPE 2.2D

JAGUAR X-TYPE 2.2D 2006

Engine non-start and will not crank over. After further investigation, all the diesel injectors were removed and it was found that all cylinders were full of coolant causing hydraulic locking of the engine. The fault was caused by the water-cooled EGR valve leaking coolant into the cylinders.

The fault was cured by replacing the EGR valve and draining the coolant from all the cylinders.

Thanks to Dave at Station Garage in Whitland, Carmarthenshire.

Problem with a VAUXHALL ASTRA 1.8L AUTO

VAUXHALL ASTRA 1.8L AUTO 2005 40K

Lack of power and transmission stuck in 4th gear when drive selected. Engine management light on, fault codes stored P1895 engine torque signal range/performance, P0335 crankshaft position sensor open circuit.

The fault was cured by replacing the crankshaft sensor which restored the power loss and transmission operation.

Problem with a SEAT IBIZA 1.9L TDi

SEAT IBIZA 1.9L TDi 2010 12K

Engine management light on, DPF warning light on and glow plug light flashing. The vehicle was checked at the dealers and it was recommended that a new DPF was required, costing £2,000 to replace.

The fault was cured by using Clean & Protect, 45 minute Advanced Formula Motor Flush, adding Oil System Protector to the new oil and DPF Cleaner And Regenerator  plus Advanced Formula Diesel Treatment added to the fuel tank.


The car was then taken for a 25-30 mile road test to allow regeneration of the particulate filter.

Thanks to Adam at Fares & Repairs in Shepperton, Middlesex.

Problem with a VOLVO V50 2.0L 2004 67K

VOLVO V50 2.0L 2004 67K

Excessive oil burning, half a litre every week. Suspect oil burning due to bore lacquering and sticking piston rings.

The fault was cured by using Clean & Protect, 45 minute Advanced Formula Motor Flush carried out, adding Oil System Protector to the new oil and adding Advanced Formula Gas Treatment to the fuel tank. The owner reported after 2 weeks that the oil burning had stopped.

Thanks to Brian at Jump Leads in St Annes, Lancashire.

Problem with a TOYOTA RAV4 2.0L D4D

TOYOTA RAV4 2.0L D4D 2004 80K

Lack of power and engine management light on, fault code stored P1251 turbo over boost condition. Suspect fault due to sticking variable vanes on turbo.

The fault was cured by using Clean & Protect, 45 minute Advanced Formula Motor Flush adding Oil System Protector to the new oil and 2 x Advanced Formula Diesel Treatment to the fuel tank and carrying out an extended road test.

Thanks to James at Mitchell Motors in Hamilton, Lanarkshire.

Problem with a LAND ROVER DISCOVERY 2.54 TDi

LAND ROVER DISCOVERY 2.54 TDi 1997

Oil leak from front differential oil seal.

The fault was cured by adding Seal Conditioner into the front differential and allowing a few hundred miles for the product to work.

Thanks to Keith at Mayfair Auto Centre in Smethwick, Birmingham.