Fault code P0420

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: jayneey

Contributor
Posts: 7
Joined: Thu Jul 31, 2014 6:00 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 50000
Trim Level: Touch
Gearbox: Manual 5 speed
DPF: No

Post

Oh thanks!!! :D :D :D :D :D

That symbol comes on when spolights on, and was convinced i had the "proper" dipped symbol as well to start with (and sure it's in my manual), so thanks for setting mind at rest.

Check engine light decided to come on again the other morning (this time the A444, exciting). ran fine, so will just wait til get day off and nip back to the garage. wouldn't bother to be honest, but as we never got to the bottom of the car conking out in the middle of rush hour, am just erring on side of caution.

Thanks so much for all the help and advice, as i said, only had my first car this last month (took me 14 years to get round to resitting the test! :roll: :D :oops: ) so all of this has been really helpful!
My Name: jayneey

Contributor
Posts: 7
Joined: Thu Jul 31, 2014 6:00 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 50000
Trim Level: Touch
Gearbox: Manual 5 speed
DPF: No

Post

After all that, it turns out the cat was part of a dodgy batch and nothing to do with the sensor! a few new citroens locally had same problem, so having new one fitted for free saturday. hoopla.....
My Name: rdn

Member
Posts: 4
Joined: Mon Jul 21, 2014 7:42 am
Model: C3 Pluriel - with or without roof
Year: 2005 (05)
Engine Size: 1.4 (16v)
Fuel Type: Petrol
Mileage: 40000
Trim Level: Desire
Gearbox: Manual 5 speed
DPF: No

Post

Roland, did you get to the bottom of your P0420? I've had it coming up about once a month for a year now; car has always run fine, and the cheapo ODB tool reads it (always P0420) and clears it, then it will be several more weeks before it comes on again.

As this car is not worth much, it's not been a huge priority for me to figure out what's causing it. If I should be more worried, people can feel free to chime in an give me grief for ignoring it for a year!

Also, Jayneey, who determined your '02 catalytic converter should be replaced under a warranty? Sounds too good to be true, and I want in on it!
My Name: jayneey

Contributor
Posts: 7
Joined: Thu Jul 31, 2014 6:00 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 50000
Trim Level: Touch
Gearbox: Manual 5 speed
DPF: No

Post

Hee hee RDN, well my handy local garage who sold me the car did so with a three month warranty, and it's still under that. And he was the one who found out it was iffy after asking around. took it in saturday and got it fitted, and when i collected it he showed me the dodgy one. on the collar, there was a tiny hole in the welding, and fumes getting out, and was sooty outside which it shouldn't be. i just stood and made agreeing noises whilst he explained it (having mistaken me for a grown up). am wondering if i can get a better mpg now, am currently on 42.
and yes, i did inflate my tyres. must get those breezeblocks out the boot tho...
User avatar
My Name: C3CAR

Guru
Posts: 2816
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: 220 times
Been thanked: 109 times

Post

jayneey wrote:must get those breezeblocks out the boot tho...
That my help the handling a bit too :)
My Name: jayneey

Contributor
Posts: 7
Joined: Thu Jul 31, 2014 6:00 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 50000
Trim Level: Touch
Gearbox: Manual 5 speed
DPF: No

Post

snigger.... just had tracking done cos steering gone a bit mad and one of the front wheels looked wonky, and steering wheel definately off. apparently my tyres proper boss eyed. jesus, only had the thing two months. am going back on the bus.
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