MoTeC Global Forum

I started my Skyline today after a long lay up. It has M800 ecu with twin Lambdas. It also has a PLM. The PLM readout box was showing C4 after a warm up. I know this is open heater, but can I run the lap top and see from "live data" from the ecu which of the two Lambda sensors is faulty please, or do I need to check at the sensor plugs with a multimeter? Thanks.

Until I can get a new Lambda can I turn them off in the software and run open loop? I can post the map if required, but it's on an old hard drive right now, it would be quicker to download from the ecu than fiddle about.

You will see it in the view sensors screen or the diagnostic errors screen easy enough. Easy to turn off closed loop from adjust/functions/lambda control. Is it safe to do so, depends how close your map is, is your call.

Thanks for the fast reply Sean, Dave Rowe of Motec UK mapped it and I am sure he said the open loop map was only lightly trimmed in closed loop, so for just moving the car around I am pretty sure open loop will be OK. I won't be using it anger at all until it's replaced. I may even have a spare sensor, would need to look. Thanks again!