Technical Error code PO327

[Dog78]

Hi, well only had the car two days and the engine light has come on.
I noticed that the engine would not rev past 3k when i was in the car park at Halfords, i had gone up there to get a two filament bulb for the front light.
But when it done it first time, the engine light didn't come on, but when i was coming home it it did.
So when i got home, i plugged a code reader in into the car it came up with Po327.
I will put the pictures up in the attachments.
After looking up what that code means, what i can out on the Internet is that it is s faulty knock sensor.
Apparently it controls the timing and fuel.
It is strange that when I bought the car it had a pinking noise something you would only associate with petrol engines.
If the timing it too far advanced.
The fuel economy never changes much 42.3 and 42.5 I have seen on it.
I reset or cleared the code about 5 times and when it's cleared it revs fine, but soon the engine light comes on it goes into some sort of limp mode not revving past 3k, the engine light comes on as it get into the higher revs, saying that it did come on down the motorway around 3k once.
The last time i reset it didn't come on for about 20 miles.
The cars runs fine as when the engine light is off.
If anyone knows anything about this error code, and if it is the knock sensor, where is it.
The car is 2014 500L lounge, 1.6 diesel
All help and advice would be greatly appreciated. TIA

 

[jackwhoo]

P0237 is code in your photo which is not knock sensor

 

[jackwhoo]

Have you bought car recently?
Did you buy from dealer?

 

[Dog78]

Have you bought car recently?
Did you buy from dealer?

Hit Jack, I bought it private sale.
Is it serious fault?
The only reason i said knock sensor is that is what is said on the search engine.

 

[Dog78]

P0327 OBD-II:
Knock Sensor 1 Circuit Low​

What does OBD-II fault code P0327 mean?​

OBD-II Code P0327 is defined as a Knock Sensor #1 - Circuit Low Input (Single Sensor or Bank 1)
The purpose of the knock sensor is to alert the PowerTrain Control Module or PCM that the engine is pinging or knocking. This is important because a pinging or knocking engine pollutes the air with poisonous Nitrogen Oxide gases that cause acid rain and promote respiratory diseases such as asthma.
Code P0327 indicates that the readings from the #1 Knock Sensor circuit are too low, is outside of its operational window and malfunctioning

 

[jackwhoo]

Search the number from your code reader

 

[Dog78]

Jack it is not easy to read the error code reader in the attachment.
But it does Circuit 1 low?

 

[jackwhoo]

P0237 is code in your photo

 

[Dog78]

You are absolutely correct, i misread it.
Sorry about that.
That code means the below, it is what i can find on the Internet.
It mentions boost, like the code reader.
P0237 is an OBD-II generic code that is set when the powertrain control module (PCM) detects that the intake boost pressure sensor voltage falls below specifications. This may be due to a short in the wiring. The Boost Pressure Sensor tells the PCM how much boost is coming from the turbocharger/supercharger.

https://www.kbb.com › p0237

Turbocharger/Supercharger Boost Sensor "A" Circuit Low​

 

[jackwhoo]

Find the Manifold absolute pressure sensor (MAP sensor) it is the sensor for boost pressure.
Check it's electrical connection plug and socket, check the wires, for anything iffy looking/ broken badly repaired wires , insulation worn through etc.

 

[Dog78]

Find the Manifold absolute pressure sensor (MAP sensor) it is the sensor for boost pressure.
Check it's electrical connection plug and socket, check the wires, for anything iffy looking/ broken badly repaired wires , insulation worn through etc.

Thanks Jack,
This is something i found on another thread, because my dash started saying hill assist unavailable, Start stop unavailable,
and something else. I didn't even know it had hill assist.

BTW this has also cured my issue of the cruise control dropping out and shift indicator stopping working after a short time. I am guessing that having proper boost control affects a lot more than you realise!

I think you are certainly right here. Turbo engines need the turbo assistance and if it is not available then with no boost the engine will struggle under load and want to change down. On a manual car then this will have multiple effects. Cruise control cutting out, aircon cutting out, possibly even Start and Stop.
Where will i find this MAP sensor on the intake manifold?
Thanks for your help Jack.
It's definitely the that sensor or the wiring as what it says about the error code, is exactly what code reader said.
Does it effect the emissions, as when I delete it, it says you sure you want to delete this emissions related fault code.

 

[Dog78]

I found one eBay, so at least i know what I am looking for

MAP Sensor Fits Fiat 500L 1.6 D - 5 YEAR WARRANTY | eBay

VERY IMPORTANT. Other MAP choices also used on your model - Message your reg number before purchase. Ref INT 16869. MAP Sensor. At Purevue we are committed to sourcing parts of OE quality or beyond in order to ensure we will not let the customer down. . Cross Reference: ALFA ROMEO: 55206797 ALFA...

www.ebay.co.uk

Thanks for your help Jack, it was greatly appreciated, I will check the wires and get one too.

 

[Dog78]

His Jack, i thought i would give you an update, also it might help someone else with a similar problem.
Bought a Boost sensor from eBay, they asked for all the details of the car so they sell you the correct one, but it was the wrong one.
I could not find where it was situated on my car a 500l lounge 1.6 diesel 2014.
The garage told me it was on the the rear of the inlet manifold, but I couldn't find it, so took to the garage, Small Car Services in Eastleigh in Hampshire,where they said it was the wrong part.
So they ordered one, done the cambelt.
They took it for a drive, it was OK till they pushed on the accelerator hard and boost fault came up again with check engine light.

After further investigation they found out the waste gate solenoid was stuck so they took one off another car fitted to mine and after that they took it for a test drive and it was perfect. They ordered me a new solenoid for the wastegate for tomorrow and then after they fitted it I can pick the car up.
I am just happy it's running properly.
I hope the fuel goes back to normal because at the moment it's only doing 42 to the gallon.
Thanks for your help, and the code was PO237.
The solenoid costs £90.

I found this garage on this forum, which was very handy,would highly recommend them, told me what was going on and halved the price of the cambelt price.

 

[varesecrazy]

SCS have a very good reputation, good to hear you also have had great service there

 

[Dog78]

Hi varesecrazy,
they must be responsible for the Ozone as people drive miles to get their car repaired there .
On a serous note, you are absolutely right, specialists like them are a dying breed.
Hence i have to take my track bike four hundred miles round trip to get it mapped, and nearly the same for the suspension.
Darren the suspension man, when I was there the phone was running constantly, and he was already booked up for six months.
Yes SCS have a great reputation, the have five stars reviews, 175 of them and not one has less than five stars which is very rare, tbh, I have only seen that the two places I've where i take my bike to.
To take a part off another car just to check if everything is OK and to check there's no more wrong with it, and they don't have to order any more parts is sensible and prudent.
I was a member if Halford premium motoring club for a week, until i looked at the reviews for the free mot, and a discounted service. It was far from free, someone took a VW Caddy there, they failed it on 9 major advisories.
He was quoted £900 for the work, so he took to his local garage, they laughed at the failure certificate.
They said at best, maybe three could be considered as minor and passed it with no work.
Hence i will taking my car to SCS for the service and mot.
The cambelt was my biggest worry followed by the Boost sensor and poor running and fuel economy.
It's mot runs out the start of July so i will get it serviced then.
I am lucky that they are only 9 miles from me.

As usual the forum has been a great asset

 

[Dog78]

Never thought, i would be writing this, the engine won't rev over 2 5 k in neutral, the car goes like a rocket now, and besides that the hill assist which it says was unavailable before repair, well it don't say that, but it don't work, you know i am confused, I park it up a hill, now today it did do something strange, it stopped and i thought it was touching the kerb, but I was at least 3 inches away from it, it would not roll back but for a limited time, about 3 seconds think I will check that again.
The fuel mpg show the same 42.2 mpg, but when I filled up the last time, it says it would do 340 on a tankful, but now it shows 431, I devided that by 35 litres as that is what a full tank is said to take the divided it by 7 and ended up with 62mpg which is reasonable, but not what the dash says. Time will tell.
I put the code reader on it and all it mentions is the evap i wonder if that is stopping it revving in neutral?
l clear it, but it ain't a code just a message about the Evap and it returns, I read it has to do with a canister and a return valve.
The start and stop I am not sure about either, but Dean did say make a list and I forgot, I will check it out tomorrow.
The engine bay looks like a new car, the service there is second to none, a comprehensive report with the work carried out, how it went, what's done and even an advisory to keep an eye on the coolant level as it has been changed, i aways like to change things while I am in that art of the engine and it only made sense to change the water pump and the auxiliary Bell and coolant.
Well thanks for your help everyone.
I have some operations coming up, so the bikes are laid up in storage.
So i can get this car to what it should be, tyres next and not and service in June after i come back from the TT.
It is getting there slowly, I am bit peeved that i had to do so much work but at least i know what has been done.
I really wish i had had a Fiat before and now why people like them so.  

 

[jackwhoo]

You were posting at 04.00 hrs!
Hope u ok.
Lots of cars will have a rev limit programmed in to ecu if in neutral or clutch pressed. If car goes like "A rocket" now don't be concerned. I have guessed you meant rev limit in neutral 2,500 rpm
Rather than 25,000 rpm (-:
Best wishes
Jack

 

[jackwhoo]

Hill assist is ..
Stop on hill with brake pressed....take foot off brake.....Hill assist keeps brake pressure up for about 3 seconds. Less than 3 seconds if you drive off as it senses drive off intention and releases brake pressure.

 

[varesecrazy]

Hill assist is ..
Stop on hill with brake pressed....take foot off brake.....Hill assist keeps brake pressure up for about 3 seconds. Less than 3 seconds if you drive off as it senses drive off intention and releases brake pressure.

Never used it myself, but that sounds correct,

It's termed "assist", so not designed for long stops ( probably a benefit with a semi-auto..)

 

[Twotone2]

Never used it myself, but that sounds correct,

It's termed "assist", so not designed for long stops ( probably a benefit with a semi-auto..)

My daughter's car has hill assist (VW Polo 2015) and I think one of ours had it too, I never use it, can't see the point in it to be honest.