Hi all i have a 2011 greenline mkii and recently the glow plug light (flashing amber) then engine light (static amber) came on. I checked with obdii and got codes p0236 & p0237 but the car drives normally. On 2 occasions it started in limp mode but restarting engine was fine. 3 guys have had a look 1 said change map sensor, 1 said could be turbo other said waste gate is stuck in closed position. So changed sensor, no difference. Has anyone had a similar experience 

It's most likely to be a small boost leak or stuck EGR valve, something is reducing MAP somewhere, mindlessly changing parts is almost never the solution but it pays well so mechanics stick with it.

While i was getting it looked at a random guy who came for some parts said its usually egr. But  where i usually take cars for repair, apparently the wrong sensor came so they told me to get the sensor and do it myself, dont think they wanted to touch it

You need to check for intake leaks, you can buy a can of leak testing smoke to help with this.

Then you need to get the wiring loom checked, the faults you have listed do not support a scattergun parts replacement strategy so it's of no interest to most garages.

Ok thanks,  I'll try that this week.

There is one more thing i forgot to mention, when I changed the map sensor there was a small amount of oil on the end. I'm no mechanic but im sure its not meant to be in there.

32 minutes ago, imarsh said:

Ok thanks,  I'll try that this week.

There is one more thing i forgot to mention, when I changed the map sensor there was a small amount of oil on the end. I'm no mechanic but im sure its not meant to be in there.

 

It's unavoidable due to the engine breather venting into the intake.

Nothing to worry about.

Thats one less thing to think about, thanks for your help I'll try your advice

Got it sorted out now. turns out it was the intake manifold pressure sensor