First Line Group (FLG) diagnoses a failing pressure hose on a Ford Mondeo IV, Galaxy II and S-MAX.
The Ford Mondeo IV and its derivatives are fitted with a DPF matrix that is coated with a platinum-based catalyst. This lowers the temperatures needed to start burning the soot/carbon and is designed to last about 120,000 miles. The DPF is monitored by a differential pressure sensor for conditions where it may be overloaded. The monitor compares the calculated restriction of the DPF to two thresholds.
By exceeding the first 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)’.
Sometimes the code is just cleared and the vehicle is driven away. However, if the original problem isn’t found and the vehicle exceeds the second threshold for a sufficient period of time, the DPF warning light and the MIL will be illuminated, 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.
How ‘full’ is the DPF?
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’re subject to (up to 600˚C 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.
The solution
Alongside its premium quality First Line turbo hoses, the First Line Group (FLG) has now introduced a set of replacement pressure hoses for the DPF on the Ford Mondeo IV.
Component FEH1000 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.
