Alongside its Turbo Hose range, the First Line Group (FLG) has now introduced a set of replacement Pressure Hoses for the diesel particulate filter (DPF) on the Ford Mondeo IV which are often prone to premature failure.

The Ford Mondeo IV and its derivatives has a DPF matrix which is monitored by a differential pressure sensor. If this detects an exceeding of a certain initial threshold for a sufficient period of time, the DPF warning light will be illuminated. It is likely that a scan tool would then show code P2002 - Particle Filter: Efficiency below limit (cylinder bank 1). At this stage technicians often assume the DPF requires total replacement which is a costly procedure and in many instances is not the cause of the warning. 

If the second threshold is exceeded then the DPF warning light and the MIL will be illuminated and engine output will be limited and the EGR disabled. Effectively the vehicle will be in ‘limp’ mode as the DPF is likely to be full and may now need to be replaced along with any other components that have led to the failure.

The Ford Mondeo IV, Galaxy II and S-Max are fitted with a pair of rubber hoses, which run to and from the exhaust system either side of the DPF, allowing the connected pressure sensor to monitor the pressure differential either side of the DPF and consequently calculate how ‘full’ the DPF is and therefore when the car needs to carry out its regeneration. Due to the arduous conditions in which these hoses operate and the very high temperature fluctuations they are subject to (up to 600 degrees Celsius during DPF regeneration), it is not uncommon for these rubber hoses to become fatigued, hardened, brittle or scorched. This can lead to their failure, which will subsequently cause the differential pressure sensor (DPS) to register the incorrect reading.

First Line advises that if the vehicle is reporting engine code issues such P2002, P2452, or P2453 relating to the DPF or DPS, then there is a possibility that the DPF Hoses are the cause and require replacement. The inspection of these items should therefore be the first thought as it could save the vehicle owner from a lengthy repair and subsequently, a costly bill.

Having recognised the need for a premium quality aftermarket replacement, First Line has introduced FEH1000, which can be fitted in as little as 45 minutes if the vehicle is raised on a ramp and the sub-frame cross brace is removed so that access can be gained to the DPS, which is located just behind the engine. This item is available from First Line stockists.