2010 Vauxhall Insignia 1.8 sri Svs light

Vauxhall Insignia Problem
The Problem
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Matt318
Fixes: 2
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Svs light
Dec 14, 2016 (3 years ago)
Keep getting the svs light flashing on and off alongside a slight drop in power.
Once the car is warm the svs light stops coming on and the power returns.
I've had the car scanned twice by vauxhall and halfords and neither can find any stored faults.
Help!!

Car details
Car: Vauxhall Insignia
Variant: 1.8 sri
Model Year: 2010
Category: Electrics, ECU, Warnings & Lights

Recalls: Vauxhall Insignia Recalls
More: Vauxhall Insignia Problems
Parts mentioned in this problem
Replies and solutions
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1/4drive
Fixes: 1,862
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Dec 15, 2016 (3 years ago)
Find a real mechanic!
The thing about fault codes are they're only there IF the checked parameters are not right.
And as your fault is temperature related it would "suggest" that the coolant temperature sensor isn't relaying the right information to the ECU.
Now it wouldn't take much of a fault to in effect "Not put the choke on"
If your old enough to remember when cars had chokes.
Ask you Dad if your say under 30!
Not the most expensive part to replace and easily done so just on a guess I'm saying renew the coolant temperature sensor.
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Matt318
Fixes: 2
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Jan 11, 2017 (3 years ago)
Ok. So today I had the large thermostat housing replaced along with thermostat yet again ( apparently vauxhall wont sell them sepetately) and all the attached sensors ( I think one of these is the coolant temperature sensor) due to there being a hairline crack in it and loosing coolant but I'm still getting the svs light coming on and off until the cars hot.
All vauxhall seem to be able to find is the radiator temp sensor is reading slightly hot but nothing to be concerned about. Is this the same as the engine coolant sensor?
All noticing when the car is hot it's hard to start.
Car never overheats or goes above 90 on the temp guage btw.
This is driving me mad as no one seems to be able to find the fault.
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Jiggy
Fixes: 1
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Jan 25, 2017 (3 years ago)
Hiya mate.
The SVS light is for the engine needs inspection.
Common fault is glow plugs
Or power to glow plugs
Check relay or fuse
Or glow plugs module.
Control module soft ware also give this fault.
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Matt318
Fixes: 2
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Jan 26, 2017 (3 years ago)
Car is a petrol so no glow plugs. Bought a cheap op com from ebay which has brought up a knock sensor fault.
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