Check Engine Light

[Pumped]

Hey guys,

Just after some help, last night i was driving my euro "Spiritedly" through some corners, nothing to hard or unusual.. i havent done any modifications to the car for quite a number of months now and about 30 seconds after slowing down to normal speeds i had the Check Engine light come on
http://beancounterblog.com/wp-content/images/checkenginelight.jpg (similar to this)

What are the possible causes for this? i do have an aftermarket cat and that was the first thing that sprung to mind for myself but having had this on for over 6 months now without a problem i thought i'd ask about other possible causes.

i have turned the car off and restarted etc, its still there today.

Any ideas?

[aaronng]

It's most probably an emissions problem. What cat are you using? You need read the CEL code first, then clear it to get the light off.

[Pumped]

thanks for the quick reply :)
ive got a 3 inch metal cat custom fitted, its due for a 20,000 km service very soon, will it be fine to wait until then to check it?

[aaronng]

Go to any competent mechanic and they should have an OBDII diagnostic port scanner. You can even buy one from ebay (make sure it supports Hondas/Acuras) and do it yourself.

[E-Gene]

Yup

http://cgi.ebay.com.au/OBD2-OBDII-Can-Bus-Diagnostic-Code-Reader-A30-Scanner_W0QQitemZ290135962815QQihZ019QQcategoryZ32 053QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

[Pumped]

Ok ive pulled the code and its coming up with the following two

P0134 -O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

& P1157

which 02 sensor is this? before cat i assume?

any ideas what the P1157 code is caused by?

Thanks

[ECU-MAN]

check them both. it wont hurt.

could have become unplugged

[aaronng]

P0134: A/F sensor (Sensor 1) Heater System Malfunction
P1157: A/F sensor (Sensor 1) AFS Line High Voltage

It's the first sensor before the cat.