Hi all.

Just got hold of a 2001 Wrx uk300 running about 340bhp.
Running td05h
Pink sti injectors
255 fuel pump.
FMIC
1.4 bar of boost on ecu tek

Just a check light coming on motorway only, sitting about 75mph in 5th gear.
The read the code as P0546 (Exhaust gas temperture sensor) . If I use it round town and country lanes sprint driving its fine . Soon as I get motorway about 75mph in 5th for a while the light comes in.

The sensor looks likes it plugged into the manifold like directly under the airfilter . Is this the sensor in question. Can't see a pre cat on the up pipe ? Has anyone got any pics of uppipes with the EGT sensor . My up pipe looks the same as my brother 2002 Wrx sti type uk.

If any one can help I be very grateful.

Cheer
Dave

 

My egt sensor was plugged into the up pipe and plugged in near the boost solonoid, when i changed the up pipe to an sti de cat one there was no boss for it so under the instruction of a well known mapper i simply left it out and the map will be tweaked to turn off the CEL, so from what i have been told dont worry about it.

 

It's most likely a faulty sensor, but... get it checked out in case you are running high EGTs.

 

On quick look today in the rain. There doesn't appear to be no wires off the up pipe . The EGT sensor looks like its bolted to the bottom on what looks like the manifold near where the up pipe bolts on. It's wierd tho just do some sprint driving and it's nice . Soon as motorway comes up and drive slow in 5th like 75mph . The light check comes on saying P0546.


Strange cars

 

Hi Dave

I assume you are running decat up pipe and this can cause this,on older EcuTek you can't disable this code(maybe now is possible)

Speak to your mapper or EcuTek dealer(,Simon,MartynJ,Andy F or Bob here) about the mapping out this if its available option

But cheapest option will be to buy 2.2k Ohm resistor from Maplins,here is guide how to do

http://www.scoobypedia.co.uk/index.p...chanicalCELFix

Or someone with Tactrix can disable this easily


Jura

 

The sensor in the pipe before the up-pipe is the O2 sensor.

If there's nothing in the up-pipe, it's possible a resistor was used to fix the EGT CEL but that this has either come out or in knackered. As Jura says, you can disable the CEL via the map.

If your car us EcuTek mapped, then only an EcuTek mapper can disable it.

 

Problem is on older EcuTek maps is not possible to disable EGT CEL

Probably easiest way to be speak to mapper or fit the CEL resistor,which will be good enough on longer run


Jura

 

Sounds like the EGT has been ditched and someone has used a CEL fix with a resistor in the socket next to the drivers side suspension turret where the EGT sensor should be plugged.

Sometimes it works, sometimes it's flakey........mine was flakey so had RaceDynamix turn it off. Have a look at the plug where it should be under the bonnet

Shaun

 

So should the EGT sensor be on the middle of the up pipe or the top near the turbo? Where abouts should the pre cat be on the up pipe aswell. Mine just looks like a pipe bolted from the manifold to the turbo.

If its running the a decat uppipe. Could I just unplug the sponsor and use the 2.2k ohm resistor with no problems . As a cheap fix? Any ideas guy? Of could that cause me problems?

Cheers
Dave

 

It's still plugged in at the moment with no resistor at moment . But the EGT sensor looks like its plugged in to the manifold and not the uppipe.

 

Confused as to what that sensor is underneath the airfilter on the manifold. Either 02 sensor or EGT sensor? My uppipe is clear of sensors and wires of what I can see!

 

O2, as I said above.

@Jira, I meant more that if it's been mapped with EcuTek, you won't be able to use OS to switch off the CEL.

 

Think I might have found the EGT sensor. I post up some pics let u have a look guys .

 

this is the best pic i can get!

Is that the Egt sensor and is this decat????

cheers
dave

 

I would say YES and YES.

 

Anyone else opinions ?

 

at a guess youve had a decatted up-pipe fitted and had your egt sensor fitted in that,with no cat in th eup=pipe its now throwing a cel because sensor is out of range at 75mph motorway and needs unplugging and the resistor putting in as a quick fix,alternatively turned off on the map if possible.

 

If I unplug it and put the 2.2 ohm resistor in it and tape it up. Can I snip the EGT sensor wire and leave the sensor in the uppipe unplugged ???

Would that be ok?

 

Errrmm YES and YES

 

rather than cut it, just tie it to one side safely

 

Yea ok just tie it up. As long as it be fine and that's the way everyone sorts it out?
Just making sure it was a decat uppipe before I started disconnecting it. As heard EGT sensor is only for the uppipe cat temperatures.

 

You don't have the right software then........

 

I use the resistor and my obd scanner to reset it. I heard another thing about the sensor breaking down and being sucked via the turbo . Am I worrieing about somethink that will be fine plugged in to the up pipe but not having it wired up . Just using the resister In place???

 

Plug the hole with a bolt instead of the sensor.

Without the cat, if the sensor breaks up it'll go straight into your turbo!

 

Once it's mapped with EcuTek (though, TBF doesn't apply to some of the earlier maps), the map is locked and can't be updated unless you have the EcuTek software (which, no, I don't have).

 

I'll drop you a PM.

 

Are the common to break up and hit the turbo? Just looks like hassle getting the sensor out and finding a bung for it;(

 

Incorrect

 

...well, it's locked as far as ROMRaider goes. I've since been informed that you can do it with other software.

 

Romraider is VERY clunky, slow and buggy.