Headlights flickering when driving or stationary

Questions not related to the fuel type, like Manual Gearbox, Body Work, Lights, Interior trim and Seats, Steering, Brakes, Beeping, Wheels and Tyres to be asked in this topic only.

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My Name:
Pete C

Contributor
Posts: 13
Joined: Mon Jun 03, 2019 4:42 pm
Model: C3 2006-2009, Facelift model
Year: 2006 (06)
Engine Size: 1.4
Fuel Type: Petrol
Mileage: 96000
Trim Level: Desire
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
Been thanked: 2 times

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Hi again, no there was no engine light on at the dash but it was not performing very good. After I fitted the new sensor it has made quite a difference, pulling better with all on board.
I will check the terminal as you pointed out and if the voltage rises or falls as per the volt increase and report back.
Thanks, Peter.
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My Name:
Ozvtr

Moderator
Posts: 1333
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
DPF: No
LHD or RHD: RHD
Engine name: TU3 (75 PS)
Location: Brisbane, Australia.
Has thanked: 80 times
Been thanked: 417 times

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The crank angle sensor is not much more than a coil of wire.
The engine ECU can tell if the sensor is short circuit or open circuit, but if the sensor is not quite working right...well...the engine ECU has nothing to go on. It can only assume the information coming from the sensor is correct.
These sorts of faults are frustrating, it's better if something just breaks, then the ECU will tell you what's broken.
Hmm, I currently have a "indeterminate misfire" fault. Slight misfire at speed and idle. I'll get onto the LEXIA and check the timing. That's a good diagnostic symptom. I'm currently suspicious of my Chinese fuel injectors but I'll check the timing. Thanks.
My Name:
Pete C

Contributor
Posts: 13
Joined: Mon Jun 03, 2019 4:42 pm
Model: C3 2006-2009, Facelift model
Year: 2006 (06)
Engine Size: 1.4
Fuel Type: Petrol
Mileage: 96000
Trim Level: Desire
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
Been thanked: 2 times

Post

Hi again. I have checked and cleaned the live wire connection in the fuse box as suggested. Unfortunately it has made no difference to the flickering. I don,t want to get involved with changing the electronics on the car considering its age and mileage. So unless something comes up on the code reader I guess I will have to live with the problem for now, however, if I do find out the gremlin I will post it up here.
So thanks guys- and gals- for your help.
Pete.
User avatar
My Name:
Ozvtr

Moderator
Posts: 1333
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
DPF: No
LHD or RHD: RHD
Engine name: TU3 (75 PS)
Location: Brisbane, Australia.
Has thanked: 80 times
Been thanked: 417 times

Post

That's unfortunate.
The next step would be looking at the maxi fuses under the BSM or some fault with the BSI in the glove box, but that's a pretty deep rabbit hole.

Oh! After fixing the crank angle sensor, does the car still hesitate when the lights dim? Or do you think the lights and engine fault were coincidental?

Good luck.
My Name:
Pete C

Contributor
Posts: 13
Joined: Mon Jun 03, 2019 4:42 pm
Model: C3 2006-2009, Facelift model
Year: 2006 (06)
Engine Size: 1.4
Fuel Type: Petrol
Mileage: 96000
Trim Level: Desire
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
Been thanked: 2 times

Post

Hi again. The changing of the crank sensor made no difference to the lights problem. All is still as it was originally.
As you commented, going into the engine management side would be a bit daunting so I will hold fire unless someone has a similar problem
and managed to solve it.
Thanks again, Peter.
User avatar
My Name:
Ozvtr

Moderator
Posts: 1333
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
DPF: No
LHD or RHD: RHD
Engine name: TU3 (75 PS)
Location: Brisbane, Australia.
Has thanked: 80 times
Been thanked: 417 times

Post

Pete C wrote: Mon Nov 23, 2020 5:17 pm The changing of the crank sensor made no difference to the lights problem. All is still as it was originally.
You said in your first posts that the engine would 'falter' when the lights dimmed. Is that still the case?
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