LC1 Error Code 8 (8 LED flashes)
Posted: Wed Apr 27, 2011 6:14 pm
I just thought i'd add this here as recently (and increasingly) i've had issues where my LC1 will randomly throw an error and stop supplying NB SIM output to the ECU, causing the car to run nothing short of undriveably bad until the wire for the narrowband simulation is disconnected from the ECU.
I stumbled across a thread where others had pinpointed the conditions and when i thought about it, it all started to make sense.
Giving the car a lot of load or a big rev making EGT's spike then following with a long period of trailing throttle would usually cause the issue (i.e giving a hit through 1st and 2nd and then straight into 6th and cruise). Also trailing throttle for extended periods of time (such as down a very long hill on the freeway) would also sometimes cause the issue.
The issue is due to the sensor heating routine seeing the temperature rise, but not antisipating the temperature fall so quickly and it doesn't enable the heater which causes the sensor to give a slow response and flag the error, which the LC1 won't recover from without a power cycle.
The "fix" is as follows:
Revert to Firmware 1.00 (devices in recent times usually shipped with 1.10 or 1.10a).
Install Beta Firmware 1.20RC4 (ask me as it wont allow me to attach a DLD extension file).
I'll be installing this firmware this weekend when i have time to also recalibrate the sensor (as its due for it) but all reports are that the 1.20RC4 (*BETA*) fixes the issue.
Reverting to 1.00 has seen some increased heting times and slower (or as reported) smoother AFR response where the value doesn't jump around as much.
I'll update this thread on the weekend when i've installed the firmware. I just don't want to do it now incase it forces a recalibration of the sensor.
I have also been warned that you MUST have a stable and reliable connection with the LC1 through the Innovate LM Programmer software before attempting a firmware update.
I stumbled across a thread where others had pinpointed the conditions and when i thought about it, it all started to make sense.
Giving the car a lot of load or a big rev making EGT's spike then following with a long period of trailing throttle would usually cause the issue (i.e giving a hit through 1st and 2nd and then straight into 6th and cruise). Also trailing throttle for extended periods of time (such as down a very long hill on the freeway) would also sometimes cause the issue.
The issue is due to the sensor heating routine seeing the temperature rise, but not antisipating the temperature fall so quickly and it doesn't enable the heater which causes the sensor to give a slow response and flag the error, which the LC1 won't recover from without a power cycle.
The "fix" is as follows:
Revert to Firmware 1.00 (devices in recent times usually shipped with 1.10 or 1.10a).
Install Beta Firmware 1.20RC4 (ask me as it wont allow me to attach a DLD extension file).
I'll be installing this firmware this weekend when i have time to also recalibrate the sensor (as its due for it) but all reports are that the 1.20RC4 (*BETA*) fixes the issue.
Reverting to 1.00 has seen some increased heting times and slower (or as reported) smoother AFR response where the value doesn't jump around as much.
I'll update this thread on the weekend when i've installed the firmware. I just don't want to do it now incase it forces a recalibration of the sensor.
I have also been warned that you MUST have a stable and reliable connection with the LC1 through the Innovate LM Programmer software before attempting a firmware update.