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Roadster: engine warning light and high oil pressu #741589
10/05/22 04:13 PM
10/05/22 04:13 PM
Joined: Jun 2021
Posts: 1,061
New Forest
Lordofthewings Offline OP
Has a lot to Say!
Lordofthewings  Offline OP
Has a lot to Say!

Joined: Jun 2021
Posts: 1,061
New Forest
Having covered just over a thousand trouble-free miles since acquiring my S2 Roadster a year ago, today I have seen the engine warning light on. It could have come on any time in the past couple of journeys, about 100 miles, but with the sun shining on it it's very hard to see.
The oil pressure on startup was high at 5 bar, dropping to 2 bar when hot (much higher values than normally).
I have checked the easy stuff -- oil, water, belt -- nothing looks/sounds/feels/smells untoward, so any suggestions please ?


Peter
2009 3-litre Roadster "Ivor", royal ivory / green
Re: Roadster: engine warning light and high oil pressu [Re: Lordofthewings] #741592
10/05/22 04:30 PM
10/05/22 04:30 PM
Joined: Dec 2008
Posts: 20,631
South Yorkshire
DaveW Offline
Roadster Guru
DaveW  Offline
Roadster Guru
Member of the Inner Circle

Joined: Dec 2008
Posts: 20,631
South Yorkshire
My S1 will run at over 4 bar cold, and under 1 bar at idle when hot.

The later Roadsters do suffer from engine warning lights, which can be reset. Someone who has had this issue should be along in a while.

I believe it can be related to the sensors in the exhausts.


DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
Re: Roadster: engine warning light and high oil pressu [Re: Lordofthewings] #741594
10/05/22 04:42 PM
10/05/22 04:42 PM
Joined: Aug 2020
Posts: 1,260
Lytham St Annes, Lancashire
J
JohnHarris Offline
Has a lot to Say!
JohnHarris  Offline
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J

Joined: Aug 2020
Posts: 1,260
Lytham St Annes, Lancashire
I usually have the same oil pressure at start up etc. on my S2, as yourself (even slightly higher on occasion). I'm aware that lots of engine warning light scenario's can occur, I've had one warning light since I changed my radiator for the car taking too long too warm up for the ambient temp. I understand you can get a warning light for over filling the petrol tank. Best to get a read out of the fault codes as to whether it is an issue or not.


John
2008 Roadster 4 seater FELIX
prev 2006 4/4 70th LOKI
prev 1977 4/4 SEAMUS
prev 1985 4/4 MOLLY
Re: Roadster: engine warning light and high oil pressu [Re: Lordofthewings] #741595
10/05/22 04:47 PM
10/05/22 04:47 PM
Joined: Apr 2017
Posts: 1,709
Staffordshire
IvorMog Offline
Talk Morgan Enthusiast
IvorMog  Offline
Talk Morgan Enthusiast

Joined: Apr 2017
Posts: 1,709
Staffordshire
My S2 oil pressure is always high at cold start up. Can be over 5 bar even at tickover.

However, if I blip the throttle it stays there without any temporary increase suggesting that the oil pressure regulator is designed somehow to give a higher pressure when cold and then gradually drop back when hot.

When the engine gets up to temperature mine runs at about 3 bar at revs and about 1 to 1.5 bar at tickover.

I have thought for a while that maybe the engine has some sort of clever temperature related pressure regulator but can't see how that would work.


Bob

2009 Black Roadster
1999 4/4 2 litre Zetec
Re: Roadster: engine warning light and high oil pressu [Re: JohnHarris] #741599
10/05/22 05:13 PM
10/05/22 05:13 PM
Joined: Jun 2021
Posts: 1,061
New Forest
Lordofthewings Offline OP
Has a lot to Say!
Lordofthewings  Offline OP
Has a lot to Say!

Joined: Jun 2021
Posts: 1,061
New Forest
Originally Posted by JohnHarris
Best to get a read out of the fault codes as to whether it is an issue or not.

Thanks all for the helpful responses. As it's not going to heal-up on its own and I can't afford to risk ignoring it,
Numpty question #1: are all fault code readers pretty much the same, or do "we" have a preferred one ?
Numpty question #2: is there a port somewhere to plug it into that opens when you knock 3 times and say "open says me" ?


Peter
2009 3-litre Roadster "Ivor", royal ivory / green
Re: Roadster: engine warning light and high oil pressu [Re: Lordofthewings] #741603
10/05/22 05:21 PM
10/05/22 05:21 PM
Joined: Jul 2007
Posts: 23,217
Suffolk, England
John V6 Offline
Brooklands Register contact
John V6  Offline
Brooklands Register contact
Member of the Inner Circle

Joined: Jul 2007
Posts: 23,217
Suffolk, England
Get an obdII dongle on Ebay and the free torque app. The obd port looks like multi pin computer socket. It will be on the shelf under the dash.


JohnV6
2014 Brooklands Edition Roadster "Brookland's Belle" #5 of 50
Re: Roadster: engine warning light and high oil pressu [Re: Lordofthewings] #741608
10/05/22 05:49 PM
10/05/22 05:49 PM
Joined: Nov 2015
Posts: 5,486
Northern Capital of Cool
CooperMan Offline
Just barreling along
CooperMan  Offline
Just barreling along
Charter Member

Joined: Nov 2015
Posts: 5,486
Northern Capital of Cool
Peter, your oil pressures sound normal (don't forget we don't know how accurate the sender unit & gauge are anyway)

As others say best to read the code off the OBD port

Some S2 and S3 owners have managed to cancel the random engine check light by disconnecting to battery overnight, reconnect then drive a decent distance to get all the sensors up to temp

Simply overfilling with fuel can trigger the warning too


Jon M
Re: Roadster: engine warning light and high oil pressu [Re: Lordofthewings] #741609
10/05/22 05:49 PM
10/05/22 05:49 PM
Joined: Apr 2017
Posts: 1,709
Staffordshire
IvorMog Offline
Talk Morgan Enthusiast
IvorMog  Offline
Talk Morgan Enthusiast

Joined: Apr 2017
Posts: 1,709
Staffordshire
Some OBD apps work better on a particular phone OS.

IIRC the free Torque app has limitations on iPhone or at least it did when I started.

I use a VEEPEAK BLE Dongle with the Car Scanner Pro app on my iPhone .

Works well with my 2009 Roadster which "should" be very similar to yours.


Bob

2009 Black Roadster
1999 4/4 2 litre Zetec
Re: Roadster: engine warning light and high oil pressu [Re: Lordofthewings] #741622
10/05/22 08:57 PM
10/05/22 08:57 PM
Joined: Oct 2020
Posts: 35
Guildford Surrey
B
Brian G Offline
Just Getting Started
Brian G  Offline
Just Getting Started
B

Joined: Oct 2020
Posts: 35
Guildford Surrey
EML on a couple of times in the last eighteen months, just after a second or two of misfire. Both times upstream oxygen sensor. Cancelled the code, runs perfectly. I did have an oil pressure gauge problem which was a very high reading when hot, nearly off the dial. That was a sensor fault. Now replaced. B


Morgan Roadster S2
Jaguar F Pace S
WW2 Jeep
Re: Roadster: engine warning light and high oil pressu [Re: CooperMan] #741808
13/05/22 03:36 PM
13/05/22 03:36 PM
Joined: Jun 2021
Posts: 1,061
New Forest
Lordofthewings Offline OP
Has a lot to Say!
Lordofthewings  Offline OP
Has a lot to Say!

Joined: Jun 2021
Posts: 1,061
New Forest
Originally Posted by CooperMan
As others say best to read the code off the OBD port......Simply overfilling with fuel can trigger the warning too


I invested in an inexpensive OBDII code reader (thanks Amazon for the quick delivery). I get the following OBD code P0460: Fuel level sender A circuit

The online explanation is "Fuel level sensor may be faulty – Combination meter. The Error code is generally activated on detection of the following conditions: Even though the vehicle is parked, a signal being varied is sent from the fuel level sensor to ECM".

So that sounds like it could be nothing more unusual that a slightly dodgy petrol sender ? Should I just erase the code / extinguish the warning light, maybe refill with petrol ? Or some other suggestion ?

Incidentally I had ruled-out any problem with the Lambda sensors (which was the issue when the previous owner reported the MIL illuminated in 2011). I located the sensors and carefully cleaned the connectors and wiring harness (they needed it), at least I now know where they are.


Peter
2009 3-litre Roadster "Ivor", royal ivory / green
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