Cuts out, turns over but refuses to start.

Questions specifically about a Petrol powered Citroen C3 (usually engine or fuel related problems).
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Petrol engine related faults, like injectors, error codes, overheating.
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My Name: Missing Lincs

Posts: 844
Joined: Mon Mar 05, 2012 9:29 pm
Model: C3 2002-2005, Original shape model
Year: 2004 (04)
Engine Size: 1.1
Fuel Type: Petrol
Trim Level: Desire
Gearbox: Manual 5 speed
Engine name: TU3 (75 PS)
Location: United Kingdom
Has thanked: 46 times
Been thanked: 35 times


BraamN wrote: Wed Apr 08, 2020 8:41 amI have noticed that the engine light on the instrument panel stays on.
If the engine light is on there's a very high probability that you have error codes stored.

If your reader can't see them I would suggest you try another reader or a even better, Lexia.
If at first you don't succeed, destroy all the evidence and pretend you never tried :lol:
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My Name: Ozvtr

Posts: 1253
Joined: Wed Jul 10, 2019 3:31 am
Model: C3 2002-2005, Original shape model
Year: 2003 (53)
Engine Size: 1.4 (8v)
Fuel Type: Petrol
Mileage: 80000
Trim Level: Other
Gearbox: Automatic PRND
Engine name: TU3 (75 PS)
Location: Brisbane, Australia.
Has thanked: 63 times
Been thanked: 374 times


Hmm, most OBDII code readers will read most of the critical ENGINE codes, after all, that’s the whole point. There is not much on the little 1.4 engine to monitor so an OBDII reader should find why the light is on. As Missing Lincs said have you tried reading the codes now the light is permanently on?

I am trying to think of what might cause the engine light to come on but the engine runs fine. Non-critical systems like the 02 sensor heaters don’t bring on the light because…well…they aren’t critical. You might have a downstream O2 sensor out but I’m just guessing. If it brings on the engine light you should be able to read it with a code reader.

Most parts of the engine management system are needed to run the engine but the downstream O2 sensor just monitors the catalytic converter and while critical to the anti-pollution system, it has nothing to do with the performance of the engine.
Having said that I think the engine light is incidental to the car stopping. I still believe the major problem is fuel related and the light is something else. However that assumption is based on the light not coming on as the engine stops.

When the engine cuts out while driving, does it slowly (1-2 seconds) loose power and die or just drop dead instantly?

Unfortunately intermittent failures are a pain. Until they fail (again) the system will typically not give any hints of the problem and so are difficult to diagnose.
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