Eco Mode, new battery, new Alternator, Battery drained.

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.

Audio has its own section - see further down the page.

Please provide as much information as you think may be relevant like recent work on the car and you can attach photographs directly to your topic using the form below the text box.
Forum rules
One question per topic.
No Engine questions
Think: Manual Gearbox, Seats, Bodywork, Lighting, Interior, A/C, Heater, Wheels, Steering, Brakes, Tyres and Suspension
My Name: HALI

Member
Posts: 1
Joined: Fri Mar 05, 2021 12:36 pm
Model: C3 2002-2005, Original shape model
Year: 2005 (05)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 80000
Trim Level: LX
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: LHD (Europe)
Engine name: TU3 (75 PS)

Post

Our newly bought used C3 1,4l -05 seemed to be in good shape but the "econ mode" was haunting us, it was flashing now and then and ultimately drained the whole battery. The first cheap auto shop look at the car 2 days and decided to change the alternator. Three days later the battery was empty again and could not start, Econ mode was flashing again. This time we booked repair at Citroen authorized workshop. After some days they replaced the battery with a new one because it was keeping only 60% after all deep drains. In addition the alternator was changed a second time as the first one was claimed to be a "pirate" with only part effect. Again battery was drained and Econ Mode flashing some days later. We started to be desperate. BAck to the Citroen work shop, this time visit took 10 days, electrical engineer used 9 hours to trouble shoot. The real problem was a defective Earth (- pole) wire and also defective +pole at battery. Now it works but Econ Mode still flashes now and then. The shop said that by updating the BSI unit SW the flashing, which is now only cosmetic, could go away. We can liev with the Econ Mode flashes as the battery and charging system now finally works. All credit to Citroen Work shop they did not bill us the 9 hours as they regarded this their fault as we already paid for the fix one time. Journey continues.
This is our first French car, only 126tkm on ODO and really good chassis, hopefully only routine troubles ahead. Electrical problems are difficult to find I learned.
Attachments
c3_battery.jpg
User avatar
My Name: C3CAR

Guru
Posts: 2708
Joined: Wed May 04, 2011 10:01 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 186 times
Been thanked: 103 times

Post

Hello

Do you have an aftermarket stereo in the car?
User avatar
My Name: Ozvtr

Moderator
Posts: 1091
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: 51 times
Been thanked: 320 times

Post

The C3 goes into "Eco Mode" for two reasons;
1) If your car has an automatic transmission (auto and sensodrive) the car will go into eco mode to protect the transmission from damage, if there is some form of problem with the transmission.
2) If the ignition switch is set to the 'accessory' or 'on' for more than 30 minutes.
Under any circumstance the car will not come out of eco mode until the engine is started. In the case of the auto transmissions this can become a catch 22. The engine wont start until it's out of eco mode but it wont come out of eco mode until the engine starts!! But I digress.
Having a manual transmission your car will not go into eco mode unless the ignition is left on. So "eco mode" is a normal function and is not part of the battery going flat.
Judging by the photos you posted, some one has replaced the battery terminals. They are not the same as the stock terminals. I assume the dealer did that.
If that was the fault, the battery was not being fully charged.

I have a post on how to check your charging circuit with a multi meter and it doesn't take 9 hours to perform.
  • Similar Topics
    Replies
    Views
    Last post