hi i have a 1.6cr 2010 i have a fault in the ecu p2458 and tryed a new diff pressure sensor done a regen and each time 24-84 hours later its back on with the same fault checked the temp sensors and found temp sensor 1 was at 19-20 deg on idal but goes up to where it should when reving the car 125 deg but as soon as you go to idle with in 20 30 secs the temp sensor drops to 19-20 again so replaced the temp sensor and it still dose the same. it dose have a non gen turbo fitted and dose seem to be happerning since that was fitted but cant see how that will affect the temp the sensor is able to recive can anyone shed any light on this it would be helpfull thanks paul

Similar issue here...

 

http://mhhauto.com/Thread-Unable-to-clear-DPF-Fault-p2458

 

 

Typical DPF Fault Codes

P1471 - Diesel Particulate Filter (Bank 1) Regeneration not completed

P2002 - Diesel Particulate Filter (Bank 1) Efficiency below threshold

P2003 - Diesel Particulate Filter (Bank 1) Particulate mass too high

P242F - Diesel Particulate Filter (Bank 1) Regeneration not active

P244A - Particulate Filter DIfferential pressure too low

P244B - Particulate Filter Differential pressure too high

P2452 - Particulate Filter Differential pressure sensor malfunction

P2453 - Diesel Particulate Filter Differential pressure sensor malfunction

P2454 - Diesel Particulate Filter Differential pressure sensor voltage too low

P2455 - Diesel Particulate Filter Differential pressure sensor malfunction

P2458 - Particulate Filter regeneration maximum regeneration time exceeded

P2459 - Particulate Filter regeneration, regeneration frequency implausible