Mr FIAT - Your #1 source for vintage car parts

Technical error code P0236

Currently reading:
Technical error code P0236

M

martyh

Patron member
Joined
Aug 12, 2012
Messages
67
Points
18
I keep getting the engine light with this code(P0236) when i am doing between 2.5-3000 revs for more than about 5 secs .This then limits the engine to 3000 revs .After stopping the engine and restarting the fault clears itself after a variable period of time .I've done a search on this forum and it suggests that the overboost valve is faulty does this sound about right given the symptoms i describe
 
MAP sensor in all probability, try taking it out, cleaning the gunk out of it and see if the fault clears before you order one.
 
momoe said:
MAP sensor in all probability, try taking it out, cleaning the gunk out of it and see if the fault clears before you order one.
Click to expand...

To be honest that is exactly what i have just done ,the sensor was full of black oily gunk there wasn't even a hole at the end so will run that and see how it goes

Thanks
 
A mentioned yesterday i have cleaned the MAP sensor and noticed a big difference in power output and MPG .On my trip to work i usually get 31mpg ,stop start A roads .Today i got 43mg ,so a big diffference there .I took it up the motorway for a spell and the engine light still came on as i was climbing a long hill and approaching 3000revs so i am thinking that i need to pull the overboost valve off at the weekend and clean that and make sure it is working properly ,unless anyone has any other thoughts
 
I had a something very similar on my car (04 JTD 115) a few years ago. A diagnostic check at a garage pointed to it being the MAP sensor, which they replaced. I think the fault code may even have been the same as yours.

However, took it out for a quick thrash and the engine light came straight back on at 3000rpm under load.

It turned out to be a short length of rubber hose (about 2" long) that the other end of the vacuum tube from the MAP sensor pushes into. It had perished a little and there was a small split about 1/4" long in it at one end. This was enough for me to loose vacuum to the sensor, flagging the engine control fault. The fix cost me 50p!

It might be worth having a look at the same bit on yours.
 
widemouthfrog said:
I had a something very similar on my car (04 JTD 115) a few years ago. A diagnostic check at a garage pointed to it being the MAP sensor, which they replaced. I think the fault code may even have been the same as yours.

However, took it out for a quick thrash and the engine light came straight back on at 3000rpm under load.

It turned out to be a short length of rubber hose (about 2" long) that the other end of the vacuum tube from the MAP sensor pushes into. It had perished a little and there was a small split about 1/4" long in it at one end. This was enough for me to loose vacuum to the sensor, flagging the engine control fault. The fix cost me 50p!

It might be worth having a look at the same bit on yours.
Click to expand...

Cheers for that ,what i plan at the weekend is to get the front up on some ramps and check all the tubo pipe work and remove the overboost and clean it because it does look very rusty
 
widemouthfrog said:
I had a something very similar on my car (04 JTD 115) a few years ago. A diagnostic check at a garage pointed to it being the MAP sensor, which they replaced. I think the fault code may even have been the same as yours.

However, took it out for a quick thrash and the engine light came straight back on at 3000rpm under load.

It turned out to be a short length of rubber hose (about 2" long) that the other end of the vacuum tube from the MAP sensor pushes into. It had perished a little and there was a small split about 1/4" long in it at one end. This was enough for me to loose vacuum to the sensor, flagging the engine control fault. The fix cost me 50p!

It might be worth having a look at the same bit on yours.
Click to expand...

Hang on, what am I talking about? the MAP sensor only has an electrical connection to it. Need to go and have a look under the bonnet......

......it's the short piece of rubber pipe that connects the smaller (hard, black) tube to the bottom of the solenoid. Mine now looks as though it's got a hell of a kink in it, which can't be doing it much good. Another job to put on the list!
 
Last edited:
widemouthfrog said:
Hang on, what am I talking about? the MAP sensor only has an electrical connection to it. Need to go and have a look under the bonnet......
Click to expand...


are you thinking of the overboost valve rubber pipe which goes into something else(can't think what that is), fixed between just below battery/air filter and the side of the engine block
 
Got around to looking at the overboost valve today and it looks like the actuator was stuck ,i pushed it down with a screw driver to free it and dropped some oil around it checked the rubber hose and that's ok but when i try to activate it with ecuscan it doesn't move ,so i suppose that means it's knackered ??
What is it that the valve is connected to via the rubber hose ,could it be that that's knackered and any way to test it ?
 
martyh said:
Got around to looking at the overboost valve today and it looks like the actuator was stuck ,i pushed it down with a screw driver to free it and dropped some oil around it checked the rubber hose and that's ok but when i try to activate it with ecuscan it doesn't move ,so i suppose that means it's knackered ??
What is it that the valve is connected to via the rubber hose ,could it be that that's knackered and any way to test it ?
Click to expand...

Hey did u get this sorted? Was it the boost valve at fault then?
 
You must log in or register to reply here.

Similar threads

B
Technical Fiat Multipla 2007 error code p2017
Replies
11
Views
1K
jackwhoo
J
K
Technical JTD low power, error P0235 & multiecuscan boost log
Replies
4
Views
2K
widemouthfrog
widemouthfrog
S
General Paint code
Replies
1
Views
874
MultipleMultis
M
H
General P0238 Fault code - Help required!!
Replies
2
Views
7K
Hulk83
H
S
Technical Airbag error 31 short to Ground
Replies
1
Views
2K
SimonMulti
S
Back
Top