2005 e350 6.0 diesel with 120000 miles. get p2623 code , have changed the ipr 5 times this year. sometimes it wont start and after a couple trys it starts i get the p2623 code.

Just did a 2010. 6.0 diesel. Inter cooler problems, ran bad, but ran. Fixed it and had a no start. Keyed it several times and started, started the rest of the day, So we shipped it out to the customer. Came back with no start. Through the scanner on it and no codes. But we weren't getting the oil pressure to start the engine. (takes 500 psi) Cycled the IPR solenoid a dozen times and finally got pressure and started. Replaced it and it hasn't been back. I have worked on plenty of 7.3's and always looked at the IPR solenoid first for no starts. Even told the boss to check the IPR when it came back. He told me 6.0 were different beasts. IPR solenoids aren't cheap, I would put it on a scanner to make sure.

it is an electrical issue ,you need to check the line or circuit of it..it might be touching to the body or another line break...

sounds like a hydraulic tappet ,try my trick as sometimes it works ,firstly add a 3 good squirts of fairy liquid to engine oil and a half litre of diesel ,has to be fairy and not a cheap brand by the way .Then run engine for a couple of days and the noise will lessen,then change oil and oil filter and use a diesel engine oil suitable for turbo diesel or petrol engines ,cheapest you can buy for this no fancy long life oil ,run engine on this oil diesel oil as it contains detergent and this will dissolve the clag inside the engine and the hydraulic tappet ,change oil 5/6000 miles and by this time it should have lost the noise ,then change oil regular max 6000 miles with a oil filter every third oil change and you shouldnt have any more probl?ems

ENGINE COOLANT 120000 MILES OR 10 YEARS THEN EVERY 60000 MILES OR 5 YEARS. CHANGE TRANSMISSION FLUID 120000 MILES.

have you tried replacing the fuel filter?

they are supposed to be replaced at 60,000 miles, but if you run your fingers over the inside of the belt and the ribs have no cracks, you can get as much as 100,000 miles out of a belt.

Firstly fit a manual overide to the heater plugs .relay -push button type switch -wire -connectors ,run a wire direct from battery to relay ,other side to heater plug relay output so it feeds all the heaters ,push button inside cab with a 12v feed from ignition switch running to relay then other side of relay to earth ,leave vehicle on charge often on trickle charge where possible ,also on a full tank of diesel put in a litre of petrol to stop diesel waxing up ,nice old rug or blanket over engine and it will first time every time ,only use the petrol when weather below minus 5c though ,great vehicles these peugeots but i do like my ford transit

around 144k or every 10 years which ever comes first..;)

sound like a sensor but it could be worst timing belt come in to play if you have need replaced it at 80000 miles.

the plugs are changed at 100000 miles,but the transmission,a 5 speed electronic and needs service with "j" type fluid.every 30000 miles.
the 120000 km service is about 500 dollars. call a reputable nissan dealer