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Engine indicator (amber) warning light. 10 years 4 months ago #134736

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Some advice please … :help:

Took my treasure out for a spin today: top down, blue skies around 9 degrees C.
When I returned I drove the car over the garage door threshold and stalled with a bit of a jolt. :oops: Upon re-starting, the engine indicator warning light stayed on! So I took it out again for a short test drive. The car drove normally. No obvious problems but the warning light remained on!!
I understand this light and the Malfunction Indicator Lamp are one and the same: am I correct?
I have looked at cjj's article on fitting a mil eliminator post cat and have checked to see if the sensor is connected at both ends. Everything appears ok.
The car has a standard cat and done around 61.5k miles.
I further understand there is another O2 sensor before the cat. Can someone tell me whereabouts so I can check if any connections are loose?

XO

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Engine indicator (amber) warning light. 10 years 4 months ago #134737

Hi xo dont bother your self it will go out by its self after 1day
The only time you need to worry is if it keeps flashing
BILSTIEN DAMPERS, 4-2-1 MANIFOLD, HEAD WORK BY SABRE.

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Engine indicator (amber) warning light. 10 years 4 months ago #134738

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The post cat Lambda sensor is on the branch that exits the cat, as you know.



The pre cat Lambda sensor is on the downpipe from the exhaust manifold.

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Engine indicator (amber) warning light. 10 years 4 months ago #134764

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Hi xo dont bother your self it will go out by its self after 1day
The only time you need to worry is if it keeps flashing


Hi helsbyman
Thanks for your advice. I've been out in her this morning (top down; blue skies; 1 degree C :lol: ). The light is still on but I will give it time.

XO

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Engine indicator (amber) warning light. 10 years 4 months ago #134766

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Thank you cjj for the photos.

I'll have to get under her to see the pre cat lamba. Do you have a photo of the other end of the relevant lead?

XO

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Engine indicator (amber) warning light. 10 years 4 months ago #134917

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Hi helsbyman

As you predicted the light went out yesterday. Thanks again.

XO

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Engine indicator (amber) warning light. 10 years 4 months ago #134921

Thanks for the up date
John
BILSTIEN DAMPERS, 4-2-1 MANIFOLD, HEAD WORK BY SABRE.

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Engine indicator (amber) warning light. 5 years 5 months ago #188085

i know this is an old thread, but i thought i'd reply to it as i have the same issue - orange engine light comes on randomly, stays on for a few days, and then goes out. Car continues to run OK, and i dont think there are any OBD codes ( my OBD reader is playing up though). manual says if the car is running OK, continue to run it is ok. Why? is this a portent of doom, and is something more serious going to happen, or is it just the engine management system being finicky? i did wonder if it is an indicator that the cat is not working properly and the engine management system is sensing out of range lambda readings?

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Engine indicator (amber) warning light. 5 years 5 months ago #188087

If the engine indicator lamp is lit, then there must be a code, as this is its function.

If the fault clears, the code will still be present, even when the lamp goes out.

The primary function of the light is to warn the driver that there is an issue with something that can affect the emissions, so yes a marginal lambda reading can cause an intermittant fault, but so can a lot of other things.

Sort out a decent OBD reader and read the codes. Best to clear all historic codes, run the engine untill light comes on, then re-read the codes again.

I am suprised if the manual indicates you should ignore an intermittant light, as this indicates likely issues with the emissions.
The following user(s) said Thank You: cairnsys

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Engine indicator (amber) warning light. 5 years 5 months ago #188094

I think this is just interpretation of the manual.
A steady amber light is a fault code and you can continue to drive the car.(ignore it)
If the fault clears the light will eventually go out, but may come on again (intermittent) obviously there will be a record of the fault within the obd system.
An example would be a temporary misfire.
Obviously good practice is to investigate as the fault could, for example, effect emissions.

A flashing amber management light means stop the car!
David
:shrug:
The following user(s) said Thank You: cairnsys, Gavin207

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Engine indicator (amber) warning light. 5 years 5 months ago #188106

XO-what year is your TF?

Does it have an orange Coolant Warning Light on the display?

I wonder if the sudden jolt when you stalled caused the coolant to move forward and the header tank level sensor to drop , then sometimes they don't float back up in the header tank and the warning light stay on until the sensor floats back up eventually.

If it is a real MIL lamp then from this year any MIL lights that are illuminated will cause an MOT fail under the NUISANCE- EMMISIONS category I believe

Mike
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Engine indicator (amber) warning light. 5 years 5 months ago #188107

From time to time my amber engine light flashes - normally on the motorway when the engine has been under load and then I lift off the throttle slightly. As soon as I hit the throttle again, the light stops flashing.
I've checked numerous times - as has my MG specialist mechanic - and there are no codes to be found.
I have long suspected it's connected to emissions, but with no codes to follow, haven't done anything about it, as it's not stopped Roxy passing her MOT's.
Suggestions?

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