307 1.4L Petrol: Low Oil Pressure warning

Try and find out what grade of oil they put in your car when they serviced it,it might be too thin,(i know it sound funny but it does happen)

They said 20W-50 Shell synthetic. I cannot be sure about the synthetic part (maybe they used plain mineral oil instead), but 20W-50 is the most common grade around here and I can be fairly confident it's what they actually used.

Nikos

the only way to be 100% is drain the oil out and replace it with your own brand which u like.

Thanks Chris,

your tip about thin oil makes sense. But I would like to verify the actual oil pressure before changing the oil again. Is this (measuring oil pressure) a diy job? Getting an oil pressure gauge, hooking it up to the engine and measuring p at idle? Can you tell me where to look for the hook?

TIA,

Nikos

The good old one are the best, one u screw into where the oil light switch is, now days it is all eletric so some where in there u should be able to pick up a point to get a reading ,

Before you do all that check the oil filter. It's the paper filter in a canister type and they mustn't be overtightened when fitted. If they are the plastic valve can break off and lower the pressure. It's usually the later 1.4 or 1.6 petrol engines that do this. If you fit a new filter and o-ring, turn the plastic housing until it contacts the lower part and then go just a tiny bit more. Really it's just enough to stop it leaking!

:Chris wrote: :> Try and find out what grade of oil they put in your car when they :> serviced it,it might be too thin,(i know it sound funny but it does :> happen) : :They said 20W-50 Shell synthetic. I cannot be sure about the synthetic :part (maybe they used plain mineral oil instead), but 20W-50 is the most :common grade around here and I can be fairly confident it's what they :actually used. : :Nikos

20W-50 grade oil is NOT approved for the 307 petrol engines, particularly in Europe or wherever the weather gets very cold in Winter. Cold starting viscosity of 20W is far too high.

The only approved oil grade for the 307 EW10A engine is 5W-40 synthetic with an ACEA A3/B4 rating (or better). There are plenty of brands which meet this spec.

If you have set up an account with Peugeot servicebox the oil restriction chart is here

Thanks Ross, I was not aware of this and in fact at least two authorized dealers have repetitively used 20W-50 on my car; call it negligence or ignorance or whatever you like :-)

However, I seriously doubt that 20W-50 is the cause of the "low pressure warning" I get. If you know how I can have the car oil-pressure tested myself and are willing to share some details, I would be much obliged.

Nikos

:Ross Herbert wrote: : :> 20W-50 grade oil is NOT approved for the 307 petrol engines, particularly in :> Europe or wherever the weather gets very cold in Winter. Cold starting viscosity :> of 20W is far too high. :> :> The only approved oil grade for the 307 EW10A engine is 5W-40 synthetic with an :> ACEA A3/B4 rating (or better). There are plenty of brands which meet this spec. :> : :Thanks Ross, I was not aware of this and in fact at least two authorized :dealers have repetitively used 20W-50 on my car; call it negligence or :ignorance or whatever you like :-) : :However, I seriously doubt that 20W-50 is the cause of the "low pressure :warning" I get. If you know how I can have the car oil-pressure tested :myself and are willing to share some details, I would be much obliged. : :Nikos

I would change the oil first to the correct grade just in case the viscosity is preventing either the oil pressure sensor or the oil pump from producing the correct pressure.

I'm not a mechanic but I would think that if you do not have any oil leaks, there is no water in the oil (that is very easy to spot), the exhaust is not belching smoke,and you know that the oil level is correct (and it is the correct grade), then the only possible causes I can see are;

1. Scored big-ends
2. faulty oil pump
3. faulty oil pressure switch (or sensor)

If you know that the engine is unlikely to have scored big-ends then I would be inclined to simply change the oil pressure switch first up - these do go faulty. On my other car the oil pressure lamp started to come up and I thought it couldn't be the pressure switch since I had put a new aftermarket one in only 2 years previously when the original sprung a leak. However, I decided that I would exchange it for a new genuine type and since then it has not come up in the last 12 months.

But Nigel is. . .

Ron Robinson

:>

:> I'm not a mechanic : :But Nigel is. . . : :Ron Robinson :

Thanks for the enlightenment Ron.... You obviously have better knowledge of Nigel's qualifications. But that is hardly surprising since I am new to this group and haven't read any previous posts by Nigel.

I have only just read the post by Nigel in this thread, and while his advice concerning oil filter replacement was entirely acccurate it was not necessarily evidence of his qualification. I also follow the same method method based on many years of experience and instruction from my older brother who is a mechanic.

Just to add my two penn'orth. I can say from personal experience that Nigel really knows his stuff. He has saved my bacon on a number of occasions. Thanks again Nigel.

Hi guys,

thanks for all the replies, I have learned a lot. Unfortunately the issue has not been resolved yet. I will post a resume when (if) it does. The car has gone into "limp" mode after a "catalytic converter" fault recently, so now I have a bigger fish to fry... Or is it the same fish in disguise... Oh well, last Peugeot for me in any case...

Please advise on the cat issue in a separate thread (upcoming).

Thanks,

Nikos

Hello i know that this topic posted long time ago, but recently I bought Peugeot 407

2.0hdi 2008 and have same problem like u

on highway cars shut down, and 3 errors came up: low oil pressure too low antipolution failure ABS/ESP failure i changed oil, and filter 5w40 total quartz went to service, they check car but couldnt find anything

did u solove ur problem?

I need a solution too. I see Oil pressure insufficient after changing an ECU. the car started first but now it starts and drops again. the car cannot move. I need ideas from you guys