DPF Clinic

Recently had a Motorhome in based on a Fiat Ducato chassis in for diagnostics believed to have a blocked DPF.

First thing first full system scan and see what fault codes are present. As you can see the one that was showing was P2454 - Diesel Particulate Trap Hose Line Monitoring For Cold Condition - Signal Invalid. Other fault code is because we have the sensor unplugged.

The key element I taken from the fault was “Signal Invalid” so further testing required loaded up live data and looked at the relevant information to the sensor as you can see above 2000RPM we are still getting 0MBAR reading.

Check the actual pressure in the DPF manually we are getting 9MBAR at idle. So we know we are getting faulty reading from the Pressure Sensor is it the sensor or wiring?

Check the wiring getting the 5V on signal and feed so this vehicle requires a new DPF Pressure Sensor.

Having DPF Problems? Give us a call on 01642 688247.

Advanced Diagnostics like this £75.00

Ford Transit Connect 1.5 TDCI 2019 came in with DPF Full on the dash. After diagnosing the vehicle for £45.00 we found the DPF was not blocked and just counting high. It has Mass Air Flow Correlation fault.

From experience and previous testing and diagnosing on these vehicles we know exactly what to look for and it was this little boost pipe very common failure point with these engines.

Thorough diagnostics, testing and checking and not just scanning codes is the key to identifying problems.

We had another 1.6 HDI in that has been to multiple garages saying the DPF was blocked, which was not. Every report given to me by the customer showed an Air Flow Fault, so this is where we started.

Done a smoke test to identify any leaks in the process of checking the intercoolers pipes we noticed they are saturated in oil taken a closer look at the turbo and turbo oil seals have failed.

This thorough diagnostics was £75.00 and the problem identified.

We are closed for our annual Nurburgring Trip from 12:00 Friday 5th April until 12:00 Wednesday 10th April. If you wish to book an appointment you can call, however we may not be available at all times. Otherwise email or message and we will get back to you asap.

We apologise for any inconvenience this may cause.

Here at the DPF Clinic we don't just scan for codes with the Diagnostics and start replacing parts. We look at Live Data and see what the sensors are doing and also check the components manual to see if they are working correctly. All this takes time but by doing so can save the customer £££'s in correctly diagnosing the problem.