h8wrxs

hi

ive got an Evo 2 RS, its done 90,000kms

i took it to the local track a few weekends ago and thrashed it for the day with no problems

as i pulled up my driveway that night the catalytic converter warning light popped up on the dashboard for no apparent reason

the other thing ive noticed is that since the light came on, the radiator fan runs constantly as soon as you turn the key on and no longer runs off thermostat


ive unplugged all the temp sensors and that doesnt make the light go away, nor does it turn the radiator fan off

also ive got a 2.5" straight through exhaust with 1 muffler and 1 resonator in it, there is no catalytic converter and hasnt had one for about 6 years so theres no reason for the light to turn on...


has anyone come across this problem before? or any tips on what i should be looking at next, all the relays in the fusebox are testing out to be ok so im kinda stumped


any help is much appreciated

3gturbo

iTrader: (4)

never heard of a cat warning light you mean ses light? Have you checked the codes? The fan stays on when a/c is on or if the controller loses signal from the ecu it will run all the time. 0v = high speed 5v = off.

njboy

iTrader: (1)

Maybe your cat is clogged. Perhaps that's slightly overheating your engine now too. Btw nice car!

h8wrxs

my car doesnt have a catalytic converter anymore, so it cant be clogged, cheers though

h8wrxs

ive posted a photo of the light, a quick google search told me what it was, and no i havent had it plugged into a scan tool yet to check the codes

qsiguy

Any chance the old O2 sensor cable shifted from it's "storage" spot during your thrashing and is touching part of the exhaust or motor? Perhaps it melted through the insulation and is shorting out on something now.

meckert

iTrader: (11)

Dont reach for a solution, pull the codes and fix the problem--- could be anything.

turbotalawd

iTrader: (11)

You sure that is not the low coolant light?

Peter2F

It is a warning of catalytic converter overheating.


There is a temp sensor fitted in the cat.


If you have no cat, someone has removed the sensor and shorted the wires or fitted a resistance.


Check under the front seat ( cant say which side ) for the connector