Ford S-Max DPF Blocked

Welcome to the Auto Assist Blog easy as 1 2 3, focusing on the Ford S-Max DPF blocked problems in this blog we talk about Ford S-Max DPF blocked regeneration, Symptoms, cleaning, fault codes and how long it would take to replace a DPF. If you require technical support regarding Ford S-Max (DPF) Blocked please call 03300100411. Please note that all chemicals used are a professional grade, which is used in conjunction with a specialist machine. All replacement parts are sourced from our partner Xpart. You can also contact us by clicking here for more information. When diagnosing or finding a workaround to a blocked DPF the first thing you could try is regeneration although many times this will not work and a professional clean or replacement will be required.

The first starting point is to identify the symptoms to ascertain if your DPF is at fault….

Symptoms of a blocked DPF

• Limp mode
• Difficult starting
• Bad smells
• Loss of power

The second step is to try DPF regeneration….

Ford S-Max DPF Regeneration process

1. Ensure engine is at operating temperature
2. Drive the vehicle at a minimum speed of 50mph for at least 25 minutes
3. The warning message will go when regeneration is complete

 The third step …

Have your DPF professionally cleaned, The Auto Assist Group have a fleet of mobile vans nationwide that provide a cleaning service that includes testing and diagnostics,  cleaning of the DPF, offering the additional benefit of removing stubborn carbon deposits, created as part of the vehicle’s regeneration processes, this is without removing the DPF, our mobile equipped DPF Assist vans can do this at your place of work or home.

Benefits of using our DPF cleaning patented technology:

Removal of all residuals including PM10 particles and cerium. Efficient cleaning of all of the types of particulate filter and catalyst. Preservation of the noble metal coatings of the DPF and catalyst. Environmentally friendly process.

If you have access to a good diagnostic scanner, we have put together a troubleshooting guide for soft codes:

The Auto Assist Fault Finding Guide DPF

Fault Code	Cause of Fault code
P2002 DPF efficiency below threshold bank 1	Short distance driving
P2003 DPF efficiency below threshold	An air leak will result in sensor readings fluctuations that will trigger the codes Fuel with high percentage sulphur will contribute to these fault codes
P0470 Exhaust pressure sensor malfunction	Blockage in pipe from sensor to the exhaust
P0471 Exhaust pressure sensor range/performance	EGR valve /air leaks
P242f (if left untreated)	Faulty exhaust pressure sensor
P2031 exhaust gas temperature sensor circuit P2032 exhaust gas temperature sensor low P2033 exhaust gas temperature sensor high	Loose or corroded connectors or terminals Broken wires Faulty sensor
P242f DPF restriction (ash accumulation)	Excessive ash accumulation in DPF Defective DPF pressure sensor Clogged DPF pressure sensor pipes/hoses Open or shorted circuit/s in the DPF sensor circuit Inefficient DPF regeneration Overuse of engine or fuel system additives The active DPF regeneration system inoperative
P244a DPF differential pressure too low P244b DPF differential pressure too high	Insufficient/incorrect diesel exhaust fluid Open or shorted circuit – DPF pressure sensor Defective pcm programming Defective DPF sensor Faulty DPF
P2458 DPF regeneration duration P2459 DPF regeneration frequency	Faulty exhaust pressure sensor Insufficient/incorrect diesel exhaust fluid Shorted or open wiring to the DPF injection system Faulty DPF Open or shorted circuit in DPF pressure sensor circuit Faulty DPF pressure sensor The diesel exhaust fluid reservoir may be empty Improper diesel exhaust fluid
P2455 DPF pressure sensor circuit a high	Exhaust leaks Clogged DPF pressure sensor pipes/tubes blocked
P2463 DPF restriction	Inoperative active DPF regeneration system Incorrect installation of new DPF Incorrect clearance of previous error codes
P2454 DPF pressure sensor a circuit low	Excessive soot accumulation due to insufficient DPF regeneration Insufficient/incorrect diesel exhaust fluid Faulty exhaust pressure sensor
P2452/53 DPF pressure sensor a circuit range/performance	The diesel exhaust fluid reservoir is empty (AdBlue) Incorrect diesel exhaust fluid Defective DPF pressure sensor Clogged DPF pressure sensor pipes/hoses Open or shorted circuit in the pressure sensor Inefficient DPF regeneration

Testing the pressure sensor The location varies from the bulkhead, under the bonnet, back of the engine, or underneath near the DPF above the subframe. You will find 3 wires for the connector which plugs into the sensor.

1. Constant 5.0 Volt
2. Earth wire
3. Trigger pcm wire measuring volts

To test the sensor, either using a multi-meter or diagnostic equipment via the live data stream, measure the volts at engine idle:

• 0.4-0.5 on engine idle
• 0.5-0.7 on 2000 rpm revs
• 0.7-0.9 on 3000 rpm and above

If any of these voltage reading is incorrect then this indicates that the pressure sensor is at fault and needs replacing. Finally, if you need to replace the DPF on the Ford S-Max – the fitting time of 1.8hrs is recorded if fitted by a competent engineer.

This Blog was sponsored by

Xpart