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[laney101]

3.2 2003 mv6

Had oil in well so replaced rocker cover and gasket. Installed 6 new plugs. All bolts torqued to manual specs.

I also replaced all intake seals  on lower and middle plenum

Also replaced the vac lines with brand new genuine vaixhall vac pipe.

Car runs ace now smoother idle pick up better.

But every now again spanner loght comes on. Then goes of on own with in a few mins

Checked with obd scanner no codes. Done pedal trick no codes

Anyone any guesses

[terry paget]

Probably emissions, lambda sensor temporarily upset. They worry too much. My wife tells me I do so too. Best ignore it. She ignores me.

[New POD]

Mine does that.  My understanding is that the first cat is probably temporarily not doing it's job.

[New POD]

See link in my thread about a new exhaust. 
Thanks stemo

[cam.in.head]

i was under the impression the spanner light was for non emission related stuff and the engine light was for that purpose.?

[laney101]

Lambda sensors all new past 12 months.. i also dont have eml on at all as second sensor behimd full cat.
Cats are also the original 3.2 genuine VX ones.

Its only done it once after i did pligs gaskets seals etc.. maybe was having a hissy fit... ill keep eye on it

[Migv6 le Frog Fan]

i was under the impression the spanner light was for non emission related stuff and the engine light was for that purpose.?

Correct.

[laney101]

It ok sussed it all sorted one sensor not connected properly been fine since

[TheBoy]

A tired precat will cause the light to come on and stay on until cleared.

You need a code reader on it whilst the light is on. Do not turn off car.

[laney101]

Pre cat lambda issue  will throw up management light not spanner light..

As stated it all sorted was rear multi ram plug not connected properly


I don’t have cat issue on mine as moved sensor to back of full cat and they’re genuine cats