R34 Check Engine Light

[Marcus89]

Found that my check engine light will come on sometimes after prolonged periods of high revs (when drifting at track or last night for a short moment on a mountain drive).

When the light comes on I can't hear knock and the car does not run any differently. I also found that if I touch the accelerator pedal the light will go away straight away. After a drifting run the light is on if I let the revs drop down slowly the check engine light will disappear without me doing anything once the revs get below around 2500-3000.

It seems like a very strange problem and am just worried about causing damage to the engine more than anything.

I have:
Rb25det Neo
Full exhaust
Splitfire coilpacks
ARC FMIC
Nistune

also have but already noticed this problem before installing/tuning for:
z32 AFM
ATR43 G2.5
Bosch 023

Would the check engine light come on if there was a fault with the O2 sensor? Main reason I ask this is a long time ago the plug to my O2 sensor was badly melted yet it all seemed to work fine so I tucked it away from the exhaust so it wouldn't melt further and haven't really had any problems to indicate it isn't working under normal circumstances (I get normal economy for a r34)

[GTSBoy]

There's only one thnig to do. Either put a Nistune laptop on it or a decent generic scantool or Consult tool, and take it for a thrash until the light comes on then look at the fault code. All else is merely speculation.

[JGTC]

i would put my money on that the o2 sensor is playing up / overheating

had the same issue with my R34, whenever i would take it for a spirited drive or a power run on a motorway i would get the engine malfunction light - replaced the o2 sensor, cleared the ECU, never had the error light come back since

would go with a genuine Nissan item which is available at kudos motorsports;

http://www.kudosmotorsports.com/catalog/nissan-lambda-oxygen-sensor-genuine-nissan-skyline-r34-25gt-25gt4-25gtt-rb25de-rb25det-neo-p-187.html

[Marcus89]

i would put my money on that the o2 sensor is playing up / overheating

had the same issue with my R34, whenever i would take it for a spirited drive or a power run on a motorway i would get the engine malfunction light - replaced the o2 sensor, cleared the ECU, never had the error light come back since

would go with a genuine Nissan item which is available at kudos motorsports;

http://www.kudosmotorsports.com/catalog/nissan-lambda-oxygen-sensor-genuine-nissan-skyline-r34-25gt-25gt4-25gtt-rb25de-rb25det-neo-p-187.html

Will give a new one a go I have a good idea that it is 90% likely the issue is from the O2 sensor and nothing else. Unfortunate the error code doesn't remain long enough for me to check it without a laptop plugged in like GTSboy recommends

[sonicz]

The code is stored in memory. you dobt have to catch it the second the light flashes.

[Marcus89]

The code is stored in memory. you dobt have to catch it the second the light flashes.

Is it possible to check the stored code just through the dash or still need to get a laptop to read it?

[sonicz]

I'm surprised no one has told you this already. Basically the 2 common ways are u can use a Nissan consult cable and hook it up to a laptop with the right program, or you can get the car to go into self diagnostic mode and spit out the code via flashing lights

I would have lent you my consult but Im in syd.

But the second flashign light method method is just as easy

Search for the Service manual online, or have a look at this thread.

http://www.skylinesaustralia.com/forums/topic/266512-reading-nissan-fault-codes-ecu-fault-codes-how-read-them

That should be enough.

Edited April 9, 2013 by sonicz