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Citroën C4 Picasso ll 1.6 THP 2009 petrol - engine management system faulty - limp home?
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Author Post
bagmol   
Sat Dec 31 2022, 01:37am
Member No: #60356
Joined: Dec 30 2022
Location: Sweden
 Hello! I just recently bought a c4 picasso 2009 which is experiencing some problems. I was not bought from a dealership so sadly no warranty.

While driving I will sometimes se this image pop up and quickly disappear
- Click Here -

yesterday the image stuck and the engine speed got capped, I guess the car went into limp home mode? I could not get more speed than 20-30 mph.

After stopping by the side of the road and restarting the car the fault was gone and I was able to drive home.

I have a simple OBD2 fault code reader which did not find any active codes.

When I initially got the car after buying it and driving home I had a different problem appear:
- Click Here -

When a friend looked at the car he noticed that the air inlet to the throttle body was not connected properly and hanging out of place.
- Click Here -

We reconnected the air inlet and cleared the faultcodes. After this I was able to drive without the antipullotion reappearing.

However the first problem I described is now happening.



I need help diagnosting the problem? I was thinking that since the air inlet to the throttle body was not connected some dirt might have entered the throttle body and that it might need a cleaning.

Does cleaning the throttle body sound like a good idea in this situation or what other problems do you suggest has occured?

/br
Farmerguy   
Wed Jan 04 2023, 01:04pm
Member No: #59597
Joined: Apr 10 2022
Location: Denmark west part
 Hi i think this is hard to diagnose with no codes staying in computer?
Have you access to a autocom or psa obd tester?
I think i would check the fuses, connections etc around the battery - apperently that is a common fault these corrode and give all kinds of faults.
bagmol   
Mon Jan 09 2023, 06:07am
Member No: #60356
Joined: Dec 30 2022
Location: Sweden
Farmerguy wrote ...

Hi i think this is hard to diagnose with no codes staying in computer?
Have you access to a autocom or psa obd tester?
I think i would check the fuses, connections etc around the battery - apperently that is a common fault these corrode and give all kinds of faults.


Thanks for the reply Farmerguy. Which obd tester is recommended for this? I have a simple one which only looks for emission related fault codes I think which is not detecting any codes in the car now.

If I detect any corroded connections around the battery/fuses what is the easiest remedy for that? Should I replace the battery/fuses or is it enough to clear up the connections for better connectivity?
Ap0qalypto   
Mon Jan 09 2023, 06:29am
Member No: #52161
Joined: Sep 21 2018
Location: Republic of Serbia
 Check if you are getting water into engine compartment. Carpet which is above engine gets soaked with rain, then falls on the battery fuses. Making a nightmare.
 

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