Hi

My engine management light has come on on my Octy VRS. Has anyone got any ideas? The car seems to be running OK.

Is there anything I can check so as to avoid the need to take it into a dealer?

Cheers

May be your thermostat. Get it checked out asap. It's a long job to get done :(

I doubt a thermostat would cause the light to come on, a coolant temp sensor certianly would.

However without a fault code check its anyones guess.

I assume that's a trip to the dealer then!

Should the dealer be charging to do that check? If so, how much would they normally charge?

Where are you based?

Cost at dealer will be £30 upwards.

Based nr exeter in devon mate.

Would rather take it to somewhere other than exeter skoda to be honest. Do normal garages carry the software to do the check?

Some may well do.

Have a look on the VAG COM locator and see who is local.

There seems to be one in Exeter on VAG COM locator. I might have a phone around tomorrow and see if any local places have got one.

I assume any VAG tuning places would be able to do it. I think there is one in Bridgewater! TSR Performance?

I doubt a thermostat would cause the light to come on, a coolant temp sensor certianly would.

However without a fault code check its anyones guess.

It's what happened to me the other week. Coolant fluid and thermostat replaced.

It's what happened to me the other week. Coolant fluid and thermostat replaced.

How odd, would like the know what the fault code was for that one.

Right. I got it plugged in and it came back as:

P1297 Connection from turbocharger to throttle valve. Pressure drop

P1137 Additive mixture correction1 mixture too rich.

Had a quick look to see if there was anything obvious around the turbo/actuator but couldn't see anything. Can't understand the mixture one as I don't use any additives. The only thing I can think of is I used a different brand of petrol and the light came on shortly after that!

A number of other things showed up on the diagnostic related to the stereo so these have been wiped and the light reset.

I will see if it comes back on again. If it does I will have to look a bit deeper into it.

If anything I would imagine the pressure drop could be a split vacuum hose or something!

The light has been re-set at the moment to see whether it comes back on

Search for 17705, thats the VAG number for P1297, a massive thread on that, but i'm betting the vacuum pipes under the manifold are perished/split.

The additive fault doesnt literally mean an additive. The additive is fuel, its indicating a mixture fault, not suprising if you have a leak in the intake system (i.e a split vacuum pipe).

Are those pipes easy to get to?

Not to bad, take off the engine covers, two 5mm bots that hold a plate on to the front of the inlet manifold, drop this plate off then you can see them.

As the man says. I did one of these today, it's under the manifold goint toward the gearbox, going into a 'T' junction of bigger bore. Get both, pull the old ones to get the part numbers, the pipe is superceeded, presumably because it melted away in a couple of years....

Greg

Search for 17705, thats the VAG number for P1297, a massive thread on that, but i'm betting the vacuum pipes under the manifold are perished/split.

The additive fault doesnt literally mean an additive. The additive is fuel, its indicating a mixture fault, not suprising if you have a leak in the intake system (i.e a split vacuum pipe).

The VW code for P1137 is 17545 which leads to this thread:

http://briskoda.net/forums/octavia-i/fault-codes-17705-17545-a/7798/

As background these two links should help:

17545/P1137/004407 - Ross-Tech Wiki

Fuel Trim Info - Ross-Tech Wiki

The car is running rich at idle, which suggests to me that it is not getting enough air (or over reading the amount of air going in (MAF)) or too much fuel (or over reading the fuel in the exhaust gasses (Lambda Probe)). When at idle the induction is at negative pressure (vacuum), so if there was a split pipe, I would expect it to be sucking in unmetered air and producing a 17544 (mixture too lean) fault.

Possible indeed, you are correct.

However i'd check the vacuum pipes first, and sort the 17705 fault, then worry about any mixture issues afterwards.

The light hasn't come back on yet and I've done about 60 miles. I will have a look at the pipes at the weekend hopefully.

Thanks for all the help