Intermittant Not Starting Problem TDCi 1.8

Hi

I'm having a mare with the wifes CMax. It occasionally doesn't start, well it starts but then konks straight back out again. It doesn this about 7 or 8 times, it starts to fire but then goes straight back out. It only happens a couple of times a week ad I've gone back to it in a few hours and it started.

A couple of weeks ago it would not start at all so it went to the garage. They spent hours on it and eventually diagnosed the Fuel Filter housing so changed it. Two days after bringing it home it wouldn't start again at 630am. 10am it was fine.

I don't want to throw much more money at it so I'm stuck with scrapping it unless I can get it genuinely diagnosed easily.

I'm pretty sure the battery and starter (new one last year) aren't the problem and the garage reckon the fuel injectors are ok so I'm running out of options.

I'm going to phone them in the morning but I'm imagining they'll just say bring it in for my probing around but I'm not sure I can be arsed if its just more guesswork at £60 an hour.

Has anyone got anything cheap I can try or any advice. I ran a deep scan on my phone app it came up with the following codes:

P0380 Glowplug control circuit

P0299 Turbocharge/Supercharger underboost

U1900 Throttle Position Sensor Outputs Disagree

U261B Improper Program Termination

B1318 Battery voltage low

B2103 PATS transceiver circuit fault.

C1956 - Steering Angle Sensor Circuit Failure

Any help with this severely frustrating issue would be appreciated.