Engine Code - P1340 - Engine Misfire?

[Royceybaby]

Hi,

A few months ago, my DS3 juddered and then the engine fault light came on when accelerating when cold.

After the recovery van came, they check the code, P1340 came up. I googled it and it said engine misfire. When I restarted the car, everything worked fine and we reset the code and carried on like normal.

It has just happened again today, has this happened to anyone else?

It seems to only be when its cold. The car still drives fine after a restart. I am away on work and cant get back to my Citroen dealer. Any advice?

Thanks

[Superfly Guy]

Is it a THP engine?

[Chris_Blue]

Carbonised inlet valves/ HPFP

[albish]

P1340 Combustion misfiring on cylinder 4 fault!

+1 on Chris

[Superfly Guy]

Il laugh if it turns out to be a diesel.

[albish]

According to his last thread, its a THP150 and had carbon buildup issues since the beginning (had them solved by the dealer with 'some cleaner'), I've seen you posted there too...

[cyclone]

To be fair those posts were 2 years ago.

[Royceybaby]

Thanks guys, found another post some help! Booked in to see Citroen - even though the light has turned off. I don't like over revving my car when cold, but scared if I don't, it'll misfire and go limp again!

Yep petrol THP150. 61 plate.

The engine has also been dropping while idle, so will have that looked at too. Not sure if they are linked.

[Superfly Guy]

As Chris has mentioned, plenty of us on here with older THPs have had the same. I cured mine (60 plate) with a walnut blast and a new revision HPFP C/O SP tuning, cleared up both issues.

If the offer any treatment that is not covered by any warranty you may have, get back on here and ask advice, Jamie at SP will undoubtedly offer the best (paid for) solution.

[Chris_Blue]

Il laugh if it turns out to be a diesel.

Ive only ever seen P1340 on a THP

[Royceybaby]

*Update*

So had it with Citroen before Christmas, they did a diagnostic on the car, found that the misfire issue was down to a piece of carbon build up between the spark plug and the electrode. They also found that my 4th piston was burnt and the pressure was lower than expected. After that they said the car was fine to drive and submitted a ticket to Citroen technical to see what to do about the piston.

Received a call today, saying that the car will need a new engine/rebuild due to the piston.

Really didn't expect that, anyone else had something similar or any advice? :/

[Dangerousfish]

*Update*

So had it with Citroen before Christmas, they did a diagnostic on the car, found that the misfire issue was down to a piece of carbon build up between the spark plug and the electrode. They also found that my 4th piston was burnt and the pressure was lower than expected. After that they said the car was fine to drive and submitted a ticket to Citroen technical to see what to do about the piston.

Received a call today, saying that the car will need a new engine/rebuild due to the piston.

Really didn't expect that, anyone else had something similar or any advice? :/

You're not alone

Mine had 16k on the clock before Citroen authorised a full engine replacement under warranty. A further 16k after that and I was experiencing similar symptoms which resulted in the exact same failure (on a new engine bear in mind).

Did they advise which engine they're intending on replacing it with?

[Chris_Blue]

*Update*


Received a call today, saying that the car will need a new engine/rebuild due to the piston.

Really didn't expect that, anyone else had something similar or any advice? :/

Imagine if we had suggested that to you after your first post.... that's why we didn't offer it up as a possibility. Might have cheesed you off a tadge, just before Christmas

A small few THPs have had their engines changed, and if you ask most DS3 Racing owners, odds are their car has had an engine change for same issue

Addvice: Say "Yes please" to the new engine, and smile sweetly, then say thank you

Problem is, they just switch the engine, you will get all the original bolt ons put back on... Turbo, PCV system, water pumps, diverter valves, air intakes, ECU.... they all go back on. And if theres a fault with them......

Ask them to put a new updated map on ECU, and keep an eye on all these bits (Or sell pronto)

Good luck

[Royceybaby]

Thanks guys! Yeah would have ruined Christmas just a bit!! Any idea how much Citroen charge for a new engine? :'( I'm out of warranty.

[Dangerousfish]

Thanks guys! Yeah would have ruined Christmas just a bit!! Any idea how much Citroen charge for a new engine? :'( I'm out of warranty.

Unlucky bud, I know the feeling

All in for pistons, gaskets, etc and fuel pump set me back around £1600 all in...