My issue was the HP pump and relief valve and yes it was a PITA to change. I refurbed mine which failed and then had to get a recon one so changed it twice.

There appears to be 2 sensors, HP and LP.

good point :)

But he doesn't know. It's been diagnosed as a pressure sensor issue

Yes he needs diags, my relatively cheap Foxwell does it

I’d get your own and you’ll soon learn how to use it with us. No point going to people that wil read it but not give a definite answer or actually fix it. If you had one (Or a lend) you could check yourself the pump outputs, voltage all sorts of...

Surely plugging diags in to read pressures is the first and easiest step

You don't need the code you need to check what the pressures actually are

You need to check the fuel pressure to at least rule it out. Diags can read them.

If the HP regulator has gone faulty it will cause low pressure so may show as a sensor fault.

Did the diags give the fuel pressures low/high? HP regulator is a know common issue, ask me how I know. EDIT: I don't remember seeing any fault codes.

And then Drawing curtesy of or good friend @saxavordian

Soon so soon you'll feel compelled to reach for the Y FRONTS.

Perhaps a left handed one.

On the L320.

Coming out of Tesco's this afternoon had to stop to let pedestrians cross. There were 2 oriental lads beaming and smiling at the Rangie. They both got their phones out and started taking pics. Then stood there giving me the thumbs up sign with...

Even if you get the code how can you enter it. I thought you could turn the EKA code off with diags

Whats the voltage with engine off? If it's low on startup the ECU may not boot up properly.

How good is the battery? Had similar issue where car would start but not rev due to low volts on the ECU at start up.

Or use a solar panel and charge controller to keep the battery topped up as I do with all my vehicles.

When the Golden Girl was a tad younger, and home to HQ was approx 500miles, I would leave her for 3 months or more. On coming back she would start first turn of the key. Then her runs changed to little short hops or massive drives of 10 -20...

Maybe key code?

OP's other posts were for a L322 MY2002. Mines had a few batteries but never asked for a code. Don't see how radio code would stop it starting.

Model and year of car would help.

JohnM70 on holiday