P246b unable to regen and p0008 camshaft position 2019 1.2 puretech

[C4grandspacetourer]

Hello everyone

Have gleaned loads from this forum but my time has come where I need help☹

My c4 grand spacetourer went into limp mode on the M1 in the most inconvenient location. Highway agency managed to get me to a safe place and out the cold pending recovery at which point by chance I checked the glovebox and my code reader was in it suggesting p246b: conditions not suitable for particulate filter regen. Was stumped on 2 fronts not knowing that it had a particulate filter and why after 80 miles of motorway driving it had suddenly had enough.

Got it home via recovery and it is well and truly stuck in limp mode but now is giving me p0008: bank 1 camshaft incorrectly positioned it's only done 41k but is approaching 6 year mark in April for which a belt change is planned.

Google (the font of all correct and relevant information) suggests Campbell slip/stretch and given history of the wet belt am dubious about driving to garage (get recovered instead).

Anyone else had either the above and managed to get resolved or any relevant words of wisdom?

Kind regards
Carl

[C4grandspacetourer]

So conacted the garage that I was going to take it to initially (friend of family) who advised that it likely is a slipped belt (p0008 code) and not to run the engine again. Given it doesn't sound like a sack of spanners I may have gotten away with it mechanically. They advised they aren't geared up for doing the wet belt (having had a few other customers ask) but from contact with others, it'll also need sump off and, potentially new oil pump at around £1,600☹

They have reccomended another garage that might be able to help so now ringing around and getting quotes.

Will update as the prices come in....

[RichardW]

Welcome along.

Sorry to hear you are having trouble. It does sound like an issue with the cambelt, but with no oil pressure fault, you will hopefully get away with just a belt change. You can see the belt through the oil filler, no conclusive but you could see if the belt looks obviously in trouble.

[C4grandspacetourer]

Hi Richard

Thanks for the reply.

I had a look at the belt earlier this morning and looked like it was starting to crack without any further signs of fraying but could only see one side of it clearly. The engine had only run for a few mins with the p0008/camshaft position fault so I imagine until the belt is off might be difficult to understand full extent of degradation?

KR carl

[PaulC5]

Do Citroen give any financial help towards these wet belts if a car has been dealer serviced ?

[C4grandspacetourer]

Spoke to Citroen main dealer for a quote and they advised that if car has full comprehensive service history and services done as per the schedule then they would replace under warranty though if anything was missing or unclear then customer pays(even if still in normal warranty period). Didn't enquire if that was for all main dealers so hopefully someone on here can advise further.

[C4grandspacetourer]

So had a quote and an estimate, main dealer estimate in region of £1500 to £1800 forca degraded belt service depending on what they found (excluding water pump), and £1200 from garage to replace belt, tensioner, remove and clean pan, inspect and clean oil pick up and new water pump which I asked for while they're doing the belt (someone please advise if there is anything else I should be doing). Booked in with Local garage for a couple of weeks and transport arranged at £80 as I daren't run the engine.

Hopefully will resolve the crank/camshaft position error and will see if it does the "unable to regen" as well
Will post pics of belt if able to get any.

Saw that more frequent (5k/6 months) oil changes can help if belt has degraded rather than swelled but wasn't sure if there was any truth to it? (Edit):Also read again there was a software update to earlier engines to alert soonse to reduction in oil pressure, again unsure of validity or applicability of this.

[C4grandspacetourer]

Belt has been done (sorry no pics) sump wasn't too bad and oil pickup looked clean so might have gotten away with just the belt but better safe than sorry.

Regen fault is believed to be due to a oxygen sensor however garage is saying car nerds a new throttle body as supposedly it is hunting even with engine off. Will say it was making unusual noise when I would lock/unlock car so is plausible. Garage says oxygen sensor might be down to poor throttle accuracy so will see if that clears when throttle replaced. Hoping to get throttle done under extended warranty taken when car purchased but garage needs to get in someone to set up throttle as they dont have tooling.

Anyone any experience on throttle replacement cost?

[C4grandspacetourer]

Received unexpected phone call yesterday to say car was ready for collection!

Throttle body issue seems to have gone away for now and the managed to get car to do static regen.

Garage couldn't see any other faults and everything else looked ok on diagnostics which they thoroughly looked through to ensure everything was ok. They were stumped on why it failed to regen but all seems ok now.

Hopefully end of saga for a bit, throttle will probably need changing at some point and might see if Citroen can do a diagnostic check on it incase their OBD kit can access something others can't regards regen but back motoring again

[C4grandspacetourer]

Spoke to soon
After less than 40 miles went into limp mode again with "P246B vehicle conditions incorrect for particulate filter regeneration" according to OBD scanner. Also now coming up with a "P0172 system too Lean bank 1"

Will see if there is another garage I can take it to for diagnosis though the "system too lean" code might be suggesting an injector issue but not jumping to conclusions.

A post I found on a Peugeot forum with similar symptoms resulted in a CAT and PF replacement, though hoping for bank balance sake it's not.

[LedZep]

Could be anything about this code according to our friend O’Riley.

[C4grandspacetourer]

Hi LedZep

Thanks for the vid confirming the fault can be a number of reasons, not all of them presenting a fault code.

As O’Riley says though, get your other faults sorted first so will see if it is injector causing sillys and hopefully go from there, will be guided by mechanics knowledge and experience.

Carl