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Jun 14th, 2026
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Joined: Apr 2016
Posts: 241
L - Learner Plates On
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OP
L - Learner Plates On
Joined: Apr 2016
Posts: 241 |
Gorgeous day. Headed out for a longer trip, and noticed 10 minutes in that the check engine light is on. Nearest dealer is an hour and forty minutes away. I assume a motorcycle shop might be able to tell me why the light is on?
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Joined: May 2016
Posts: 541
Talk Morgan Regular
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Talk Morgan Regular
Joined: May 2016
Posts: 541 |
They will need S&S® Cycle Diagnostic software, if they don't have they can get from their website for free. I would take it back to your dealer if it was me.
1998 +8
SS Sport tuned exhaust
2013 M3W
Stage ll motor kit
Cats removed
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Joined: Jul 2013
Posts: 3,732 Likes: 79
Talk Morgan Addict
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Talk Morgan Addict
Joined: Jul 2013
Posts: 3,732 Likes: 79 |
Had you just filled up with petrol?
It's easy to overfill and this can sometimes cause the check light to come on.
Red Leader 
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Joined: Apr 2016
Posts: 241
L - Learner Plates On
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OP
L - Learner Plates On
Joined: Apr 2016
Posts: 241 |
Filled up yesterday before putting it in the garage. It jumped from mid ninety percent to one hundred percent once I started driving. Once it's cool I'll check all fluids and open the gas tank in case it is a pressure problem, and give it another try
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Joined: Apr 2016
Posts: 241
L - Learner Plates On
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OP
L - Learner Plates On
Joined: Apr 2016
Posts: 241 |
Fuel says 75%. Running with the cap off didn't shut off the light. Not sure if that just goes off on its own if it is that issue.
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Joined: Sep 2010
Posts: 2,431 Likes: 17
Talk Morgan Expert
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Talk Morgan Expert
Joined: Sep 2010
Posts: 2,431 Likes: 17 |
Overfilling can bring the light on. Try disconnecting the battery for 5 minutes and see if that's resets it.
1969 4/4
1995 plus 8
1996 Plus 4 4seater
2002 Aero S1
2013 M3W
2014 Plus 8
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Joined: Jul 2014
Posts: 1,767 Likes: 21
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Jul 2014
Posts: 1,767 Likes: 21 |
I think this called 'raining on your parade....'  James
Aero8 , Series 1 - Boston Green
RR Evoque P300E Autobiography
Smart Brabus Convertible
Monkey Z125
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Joined: Oct 2014
Posts: 5,016 Likes: 3
Charter Member
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Charter Member
Joined: Oct 2014
Posts: 5,016 Likes: 3 |
I had the engine light going on last November.
No loss of power or any other mis-behavior of the engine.
They did not find a reason why the light went on.
Finally I got a new ECU as the car was still under warranty.
Hannes
once: Green M3W; 2013
now: Red 4/4 Sport; 2011
and some practical cars for use in real life
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Joined: Apr 2013
Posts: 1,370 Likes: 11
Has a lot to Say!
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Has a lot to Say!
Joined: Apr 2013
Posts: 1,370 Likes: 11 |
This has been happening to me and the only other definitive time it did was when the exhaust manifold cracked and sheered off just below the bolts on the engine. The oxygen sensor mounted just after the first curve went nuts. Check engine light lit. When I mounted a new manifold the light stayed lit for awhile and now it is intermittent. It drives me crazy. Everything on the motor checks out and it IS a very simple engine, mechanically. The biggest snafu will be oil or lack of it and that has its own lamp!
What's your mileage? Who cares. Is it practical? See #1. What happens when it rains? You get wet.
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Joined: Dec 2014
Posts: 42
Just Getting Started
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Just Getting Started
Joined: Dec 2014
Posts: 42 |
This is a common problem with mine. I ignore the yellow warning light now. I had a couple cables connected to sensors that were too close to the engine and got hot and caused the light to come on. A mechanic fixed that and the light stayed off for several thousand miles but it is back intermittently now.
Another possible cause is if you get a crack in a muffler and the exhaust back pressure is wrong. One crack and the electronics can't compensate. I found with both mufflers cracked the light went out again. I have a Brooklands so exhaust cracks are a problem for me.
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