synco357

iTrader: (5)

My check engine light came on...car still runs fine. However, I was just wondering is there any way I can check the code...On my 94 Rx7 I can jump/bridge a wire at the diagnostic box then I`ll count the number of times the check engine light blinks to find the code....Is this similar for the GS 400

If so, Does anyone has the check light list?

Please advise, Thanks,

Andre

kpuri

Go to Autozone for a free Scan
Also reset to see if it comes backs to make sure there is a real issue.
sometimes its a simple fix like a loose gas cap.

synco357

iTrader: (5)

Thanks for the info. I`ll be there first thing in the morning.

synco357

iTrader: (5)

Question, 98 Gs is it a ODB1 OR ODB2

mapleleaf

98GS is OBDII.
96 or newer vehicle is equipped with OBDII system.

synco357

iTrader: (5)

Hello,
I went to Auto Zone and they diagnose the problem to be bank 2 cat. converter. I was thinking of gutting both cat/ precat. These are the ones that are mounted right off the manifold.

Right?

If I was to gut both cats would it make the check engine light stay on?

Thanks again,

Andre

kpuri

Pre-Cat O2 senors are essential for proper fuel mixture
Post-Cat O2 sensors are just to make sure the Cats are working efficiently
GS400 have a total of four 2 pre and 2 post Cat

Get the actual code from Auto Zone Pxxx
and post it, you are looking at about $100 to replace a sensor.

If you gut the cat and u will need a special sensor to replace/trick the computer to think that the cats are working corectly.

synco357

iTrader: (5)

Kpuri,
This is the code that I was given...Tell me what you think.

P0430
Catalyst System Efficiency Below Threshold Bank 2


Thanks for your time,

Andre

kpuri

Test the voltage/waveform on the rear 02, if it checks out ok then I would suspect a bad Cat, I believe emission parts are coverd for something like 7 or 8 Years/80-100k miles by Lexus.
Also check for exhaust leaks around the Cat.
I will attach the DTC Code and in a second post info on testing waveform.

kpuri

Waveform attachment.

If you have problems viewing you may want to try right click and save before opening.

enterconne

how do you reset the "check engine" light??

kpuri

You will need a OBD-II Scanner to reset /clear DTC after the repairs has been completed.
I think you can also reset by disconnecting the battery for a few hours but then the engine/tranny computer will have to relearn your bad driving habits lol

(Autozone can also clear the DTC for you as well depending on thier mood and or if you show them you have replaced the appropriate component(s) to complete the repair)

minla007

hello,

I had my starter replaced about a week ago and now i get a check engine light (CEL) warning. I went to autozone to pull the OBD2 code and its the P0430 code.

Autozone's printout says:
- Definition: catalyst efficiency low- bank 2

Probable causes:
1. catalytic converter defective
2. engine misfire or running condition
3. large vacuum leak
4. engine oil leakage into exhauset-valve guide seals, piston rings

do you think this code was caused by the starter being replaced recently? I'm not sure how to test whether its the O2 sensors or the Cat converter....

any advice would be greatly appreciated.