Citroen c2

This is the Forum for all your Citroen Technical Questions, Problems or Advice.
Juliano_1989
Posts: 30
Joined: 27 Mar 2025, 20:23
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Citroen c2

Unread post by Juliano_1989 »

Hi people I really need your help I have a citroen c2 1.1 and all of a sudden my spedo don't work when ignition is turned on it shows 00 but then beeps and has to lines then I have loads of faults showing on the screen abs fault air bag etc and have eml and few others the car runs and drives fine.. any ideas 💡
wheeler
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Joined: 21 Sep 2002, 19:07
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Re: Citroen c2

Unread post by wheeler »

Does the car have ABS or no ABS?
Does the power steering feel normal?
Does it still count up miles as you drive?
ozvtr
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Joined: 13 Oct 2020, 01:11
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Re: Citroen c2

Unread post by ozvtr »

Juliano_1989 wrote: 27 Mar 2025, 20:28 I have loads of faults showing on the screen abs fault air bag etc and have eml and few others the car runs and drives fine.. any ideas 💡
ABS fault will be causing no show on the speedo.
Bad alternator or battery are the most likely culprit for all the lights and faults, but that's not 100%.
Power steering doesn't always fail with bad battery. But failure is a common symptom.
Starter a bit "funny" on startup?
I would get battery load tested WITH PROPER LOAD TESTER, NOT A MULTIMETER! Then check charging circuit.
DO NOT dismiss a "new" or nearly new battery or alternator as NOT being the problem!! Just because it's new, doesn't mean its good! Just being preemptive there.
Batteries last about 4 years. But if YOU were not the last one to buy the battery...be suspicious.
Juliano_1989
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Joined: 27 Mar 2025, 20:23
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Re: Citroen c2

Unread post by Juliano_1989 »

Car has abs a d no power sterring and the miles count up I don't think it's the battery as it shows 14v on multi meter when running and starts each time
Last edited by Juliano_1989 on 28 Mar 2025, 04:15, edited 1 time in total.
wheeler
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Re: Citroen c2

Unread post by wheeler »

All C2’s have power steering.
Is the ABS warning lamp on?
Think it will need to fo on some diagnostics to check live data from the ABS system.
Juliano_1989
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Joined: 27 Mar 2025, 20:23
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Re: Citroen c2

Unread post by Juliano_1989 »

Yea abs lights on it has engine light on airbag loads of faults come up when plugged in
wheeler
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Re: Citroen c2

Unread post by wheeler »

Are you going to share the faults that came up when you plugged it in??
Did you happen to read any live data of the ABS system? Eg wheel speeds.
If lots of communication faults id be disconnecting the ABS, engine ECU connection & the under bonnet fusebox to check for water ingress.
Juliano_1989
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Re: Citroen c2

Unread post by Juliano_1989 »

That's one of them
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Juliano_1989
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Re: Citroen c2

Unread post by Juliano_1989 »

Here is the other 2 faults out of the 3 shown
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IMG-20250328-WA0000.jpg
Juliano_1989
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Re: Citroen c2

Unread post by Juliano_1989 »

Sorry here u go
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Juliano_1989
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Re: Citroen c2

Unread post by Juliano_1989 »

Then I had it plugged in buy a garage and I got this printed out.. this shocked me as surly all this can't be at fault but one thing must be causing a lot of communication errors plesse help guys thanks
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ozvtr
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Joined: 13 Oct 2020, 01:11
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Re: Citroen c2

Unread post by ozvtr »

Juliano_1989 wrote: 28 Mar 2025, 04:14 Car has abs a d no power sterring and the miles count up I don't think it's the battery as it shows 14v on multi meter when running and starts each time
Spider senses tell me that you haven't owned this car for very long at all. Driving a C2 without power steering for any length of time would become very annoying. Or you don't realize that it actually has power steering. Is the steering heavy or not?
14V when the engine is running only proves that the alternator is working. AGAIN, that's why I said; DON'T USE A MULTIMETER , use a load tester(on the battery)!
LACK of power steering is a symptom of a bad battery. It doesn't happen all the time but it does happen.
FOR THE LAST TIME, get the battery LOAD TESTED. It's quick, simple and shouldn't cost you anything if you need to buy a new battery.
Thinking wont eliminate a fault...testing will.
It seems counterintuitive that the battery can cause all these faults, BUT IT CAN. On startup, a bad battery will still turn the starter over BUT the supply voltages to the various control units will dip below their operating voltages and the system stops working CORRECTLY. Even though the voltage comes back up to the 14 odd volts when the engine starts, the "damage" is done, figuratively speaking. The ECU's will complain that something went wrong and that's that! The ECU's expect the system to operate a certain way, and if it doesn't, boy do they complain!
I am NOT saying that the battery is the ONLY thing that can cause these faults, but the battery MUST be eliminated as a potential cause. And it's it's right at the top of the list of potential suspects!
If it's not the battery, fine, move on to the next potential cause of failure. But the battery is the easiest, simplest and quickest thing to test.
Juliano_1989
Posts: 30
Joined: 27 Mar 2025, 20:23
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Re: Citroen c2

Unread post by Juliano_1989 »

I have owed it a while and ok I will try a battery and report back to you thank you
Juliano_1989
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Joined: 27 Mar 2025, 20:23
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Re: Citroen c2

Unread post by Juliano_1989 »

Hi all so I tried a new battery and the faults are still showing ??? I have added x2 pictures of faults being displayed while engine is running
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wheeler
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Re: Citroen c2

Unread post by wheeler »

Think you are going to need to start checking power supplies & earths at the ABS ECU.
Do you have the VIN so we can get a wiring diagram?