hi guys and girls

 

i need some help with my dads vauxhall meriva. It throws the following codes P0234 and P0400. P0234 dissaperes and reappears sometimes but p0400 is always on.

 

Car: 1.7 CDTI 2007 137k miles

 

Symptoms:

- sometimes no turbo power

- intermittent idle (sometimes). It drops and comes back up but only with the sound not the needle

- when the car with the spanner comes on it idles instantly at 1k rpm (not a dpf issue)

- white smoke until the engine heats up then  nothing

 

What I've done

- cleaned/ replaced the EGR - same issue

- repaired two joined intercooler pipes that came loose - fixed the loss power for 1 day

- cleaned the MAP (manifold absolute pressure) sensor - extremely clogged up. The car worked spot on for about 1h then back to the same thing

- cleaned the intake manifold part where the EGR bolts on. see the picture. extremely clogged. still nothing

 

Today he said that the car wouldn't rev more than 3000 rpms

 

My dad lives in Romania, he took the car to some garages and they didn't know what to look for. They all said "new EGR", but we've bloody changed two of them.

 

Does anyone know what's a common issue that might cause these errors? I looked over and over online, and I've done what pretty much everyone suggests.

 

Cheers

 

 

P.S. the egr on MY car failed today while driving home

 

Edited 15 May, 20188 yr by Bertie90

P0234 is the boost actuator solenoid.

Known common issue across the cdti engines.

Usually kicks limp mode if you give it socks above 3000rpm.

BAS is a little top thing located just to right hand side of the bonnet release catch. If its failing it can be intermittent.

Not sure what p400 is though.

Also, @Bertie90

If he holds the revs at just above 2k for a bit, in a low gear, with some minor feathering to get revs to go between sort of, 2100-1900-2100, does he get a kind of hum or mooing noise from the engine bay, maybe for just a second ? If so thats related to the p0234 issue. GM have a reservoir thingy to fit inline from the BAS to the vacuum pipe (metal pipe from bas along top of radiator) to regulate the back pressure or some such thing.

8 hours ago, mac11irl said:

P0234 is the boost actuator solenoid.

Known common issue across the cdti engines.

Usually kicks limp mode if you give it socks above 3000rpm.

BAS is a little top thing located just to right hand side of the bonnet release catch. If its failing it can be intermittent.

Not sure what p400 is though.

 

8 hours ago, mac11irl said:

Also, @Bertie90

If he holds the revs at just above 2k for a bit, in a low gear, with some minor feathering to get revs to go between sort of, 2100-1900-2100, does he get a kind of hum or mooing noise from the engine bay, maybe for just a second ? If so thats related to the p0234 issue. GM have a reservoir thingy to fit inline from the BAS to the vacuum pipe (metal pipe from bas along top of radiator) to regulate the back pressure or some such thing.

 

thanks for your input.

 

Is this the BAS you're talking about?

 

 

or this ?

 

 

29 minutes ago, Bertie90 said:

or this ?

 

 

 

This one.

 

The rubber diaphram starts to fail internally and **** up the boost actuating.

 

Edit..

Just remwbered, if your stationary and revving, these engines wont rev above 3k, to protect it as there wont be enough airflow through the radiator. But also, as the fault usually throws above 3k, if the BAS is knackered, it might be limiting revs to 3k. Not sure if your dads car wont rev above it on the move or parked..

Edited 16 May, 20188 yr by mac11irl
Extra info

it doesn't rev more when driving. But i did see the car revving up to 5k rpm when standing still.

 

i told him to go and get that part fitted.

 

anyone else for the p0400?

http://www.vauxhallownersnetwork.co.uk/index.php?threads/vectra-c-probs.436055/page-2