Ok. This really is starting to get me down. After weeks of perfect running - today same issue reappeared! I have to-date replaced throttle pedal, ecu and throttle intake butterfly sensor. It was after the last (intake butterfly sensor whole assembly) that all improved. So There is surely only one thing left - Wiring? The last wiring to have been moved / interfered with was around the intake so I suspect that area. It is all very oily and dirty but I did clean the plug and pins as best I could before reassembly. Ref earlier post......... mention of 2 track potentiometer etc. How can I test this? Where can I obtain a wiring diagram? Would an auto electrician be best, in which case he will still want a wiring diagram. Any further help appreciated. I am thinking replace wiring to intake throttle sensor. But need to know where other end goes and how to find.
“
C5 2.0 Hdi Limp mode when warm
Moderator: RichardW
-
GiveMeABreak
- Forum Admin Team
- Posts: 37339
- Joined: 15 Sep 2015, 19:38
- Location: West Wales
- My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow - x 5723
Re: C5 2.0 Hdi Limp mode when warm
Leave it with me John, I’ll knock something up for you tomorrow. 
Please Don't PM Me For Technical Help
Marc
Marc
-
GiveMeABreak
- Forum Admin Team
- Posts: 37339
- Joined: 15 Sep 2015, 19:38
- Location: West Wales
- My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow - x 5723
Re: C5 2.0 Hdi Limp mode when warm
Just realised this is a 2015 model and I don't have a schematic for this engine sorry John.
Please Don't PM Me For Technical Help
Marc
Marc
Re: C5 2.0 Hdi Limp mode when warm
Update to help anyone with similar issue.......
Problem returned. Found could instigate limp mode by twisting loom at ECU when warm. Got a wiring diagram from begrudging Citroen dealer. Traced problem to poor connection on pin 44 of ECU which only manifest itself when hot. Pin 44 is the constant live to the throttle hence upsetting the 2 track potentiometer and hence limp mode. Thin pin inserted to get proper connection on that pin from the connector - no more problem! As there is around 90 pins a wiring diagram was essential.
Much thanks to ‘Give me a break’ (Marc) for supporting me throughout.
Problem returned. Found could instigate limp mode by twisting loom at ECU when warm. Got a wiring diagram from begrudging Citroen dealer. Traced problem to poor connection on pin 44 of ECU which only manifest itself when hot. Pin 44 is the constant live to the throttle hence upsetting the 2 track potentiometer and hence limp mode. Thin pin inserted to get proper connection on that pin from the connector - no more problem! As there is around 90 pins a wiring diagram was essential.
Much thanks to ‘Give me a break’ (Marc) for supporting me throughout.