Urea light flashing and won’t go out

[pavb2]

Hi all the urea light came on I filled with 10 litres of adblue and it stayed on. I then put another 6 litres in and the light started flashing and a message came up saying I had 700 miles before starting prevented. I’ve driven and it’s still flashing now telling me I have 600 miles.

Any ideas what I can do 

Many thanks.

[Sol]

Normally it clears by itself. I'd suggest just keep driving this week, it should go away. If that doesn't work then you're looking at a garage who know Citroen vehicles and have the right software to diagnose it.

[pavb2]

Thanks Zion

It’s strange as when the Urea light first came on I didn’t have the start prevention message this only came on after I’d topped up. I was driving today and the start prevention message is now telling me 550 miles.

I’m trying to get it booked in to a garage this week.

[Sol]

It's always possible that the system has developed a fault such as the level sender saying it's empty. Or the injector is clogged etc. Looks like a trip to a reliable garage who know what they're doing would be a good start.

[pavb2]

Update: I took it into a garage the mechanic said it was a common problem with all these type of cars including Peugeot’s etc. and he’d spent hours trying to rectify them.

He did a reset and the urea light came back on straight away but wasn’t flashing or giving the start prevention message or countdown.

It’s going back in this week and he’ll clean the injector as the fluid can crystallise and clog up he’ll also check the pat fluid. Apparently a new injector is £300.

[Sol]

The big issue causing crystallization is that Adblue has a shelf life of 12 months max, so if you buy it from a petrol station, and it's two years old, then you are guaranteed to get crystallized Adblue in the tank, pump and injector.

Watch the pump..that is eye watering and not cleanable.

[Vanneria]

Hi all the urea light came on I filled with 10 litres of adblue and it stayed on. I then put another 6 litres in and the light started flashing and a message came up saying I had 700 miles before starting prevented. I’ve driven and it’s still flashing now telling me I have 600 miles.

Any ideas what I can do 

Many thanks.

Not sure which vehicle you have but I had the same warning light and issue and it turned out to be  the Eolys fluid was empty and needed filling. This give a Urea warning. A normal ODB reader won't pick that up. It's a little box under the vehicle behind the drivers door. The fluid helps raise the temperature of the DPF to burn off the exhaust particles. The fluid should last 100,000 ish miles give or take but if you do lots of stop start it lasts less than 50K miles. It's not the Adblue reservoir this is completely different. A kit exists and you pressure fill it with a pump. Sometimes it continues to show the warning light but if you program the car that a new box has been fitted the light goes out. Citroen charge ridiculous money but a garage can top it up for around 100 quid.

[kingy1912]

I now usually fill up at the pump with AdBlue if i can find one. Most places with pumps are constantly going through their AdBlue especially if heavy goods use them. I spoke to a heavy good driver last week and his lorry uses 5 litres every 1000 miles.

Anyway that injector sounds awfully expensive! I have a K9 and my injectors is 98 from Citroen.

[pavb2]

Update

The adblue injector was clogged and the pat fluid Eolys reservoir empty, the car has 40,000 miles on the clock. The mechanic cleaned the injector, filled up the reservoir and did a reset.

At the moment the Urea light is still on and a Nox sensor fault is coming up, cost to replace £350.00.

I’m going to drive the car for a bit and as long as the starting prevention countdown doesn’t come on I’ll hold off replacing the Nox sensor for the time being.

[Sol]

Hi all the urea light came on I filled with 10 litres of adblue and it stayed on. I then put another 6 litres in and the light started flashing and a message came up saying I had 700 miles before starting prevented. I’ve driven and it’s still flashing now telling me I have 600 miles.

Any ideas what I can do 

Many thanks.

Not sure which vehicle you have but I had the same warning light and issue and it turned out to be  the Eolys fluid was empty and needed filling. This give a Urea warning. A normal ODB reader won't pick that up. It's a little box under the vehicle behind the drivers door. The fluid helps raise the temperature of the DPF to burn off the exhaust particles. The fluid should last 100,000 ish miles give or take but if you do lots of stop start it lasts less than 50K miles. It's not the Adblue reservoir this is completely different. A kit exists and you pressure fill it with a pump. Sometimes it continues to show the warning light but if you program the car that a new box has been fitted the light goes out. Citroen charge ridiculous money but a garage can top it up for around 100 quid.

@Vanneria,

Absolute Nonsense. 

The PAT fluid system DOES NOT bring the Urea light on. They are COMPLETELY DIFFERENT SYSTEMS.

Also driving stop-start style has NO BEARING on how long the PAT fluid lasts, it is injected in a measured quantity into the fuel tank, by the system after each fill up, depending on how many litres of fuel you put in.

Posting answers like this propagates false information that other people come to rely on.