Immobiliser Light Problem

[Pete Edwards]

Hi

I have a 4 year old (hence out of warranty) Meriva. The Immobiliser light
has
taken to coming on now and then. When it is on there is no noticeable change
in operation of the engine and the car can be stopped and started with no
problem.
It seems to be affected by the charge of the battery i.e on a long
run in day-light it goes out and will stay out until the lights have been on
a while when it can come on. When it does come on it tends to blink on and
off for a mile or so before staying on.

All the above makes me think it is not a fault with the immobiliser but with
the sensor. Does this sound feasible? any ideas where to look for the
sensor or should I just take it to a dealer.

Thanks

Pete

 

[mikeFNB]

has the battery ever been changed?
if not id be inclined to give the girl a new one
4 yrs is a good run for a car battery.

easy task

mike

 

[Pete]

Hi
Good point

but there are no other tell tail battery signs, Are there any experts who
know if the immobiliser sensor is voltage dependant?

Pete

 

[me140]

I am not convinced it is an immo issue at all - the light is also a warning
light for an emission type engine management fault. Have you had the fault
codes read?

 

[Pete]

No I have not had the codes read, I guess I will have to take it to he
dealer for that.
I am not an expert in these things but isn't the light with an engine with
an lightning flash the ECU warning the light I have on is a car with an
arrow coming out of its roof.

Anyway I will pop the car to the dealer this weekend thanks

Pete

 

[me140]

One is an engine management warning light and one is an eobd emission
related fault (cat threatening ) warning light.
Daft really, having 2 but that is the law in Vauxhall land.

 

[Tom]

No I have not had the codes read, I guess I will have to take it to he
dealer for that.
I am not an expert in these things but isn't the light with an engine with
an lightning flash the ECU warning the light I have on is a car with an
arrow coming out of its roof.

Anyway I will pop the car to the dealer this weekend thanks

Pete

Have the codes read by all means but do not take them to be gospel. They can
show up non faults and not show up faults.

 

[airsmoothed]

One is an engine management warning light and one is an eobd emission
related fault (cat threatening ) warning light.
Daft really, having 2 but that is the law in Vauxhall land.

Agreed, having been through this recently with my wife's Zafira having
emmission problems, the engine shaped warning light is the emissions
warning, the engine management light is an outline of a car with a
spanner through it.