PCV Error Code 126 Wideband Timeout - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 3 (permalink) Old 11-15-2017, 02:59 PM Thread Starter
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PCV Error Code 126 Wideband Timeout

Ive had a PCV with Autotune fitted for about a year and found the AT was never working.

Recently Ive spent more time tinkering and have a code 126 Wideband Configuration - Invalid Timeout. This error occurs with the ignition off or on and with a zero map loaded. The serial# of my PCV starts with 15 so the CAN interface plug doesn't need to be fitted. Ive tried fitting it and the code remains.

Through emails to the Power commander support desk they have told me "I dont know what causes error code 126"

Kind strange the manufacturer of PCV doesn't know how the error codes are set or what causes them. I asked if a faulty O2 sensor would cause it but he didnt know. Instead he directed me to check all wiring and connections. The AT LED flashes in a loop 3 times flash/pause/3 times flash/pause... The help desk told me this is when the o2 sensors are heating and should become solid red. Feeling the o2 sensors I cant tell if there is any heat generated at all from them.

Ive read some threads on here about the interference issues and I still have a PC111 usb so will fit it in line with the PCV but that surely is a separate issue to the 126 error.

Anyone had this error before?

Thanks
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post #2 of 3 (permalink) Old 11-16-2017, 03:03 AM Thread Starter
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Well I seemed to fix the error code myself.

In the Powercore C3 software
Tools Menu/Load reset Default
This resets all and the error stopped
When I reloaded the old map file the error returned. So reset again and used a zero map and enabled functions one by one till the error returned.
Enabled the temperature sensor, TPS and quick shifter ok.
When I enabled Autotune and loaded the AFR trims the error would return.

I found the error was caused by setting trims above the maximum engine RPM. Since my engine is modified with oversized pistons, heads ported with aftermarket springs my over rev limit was set to 11,000rpm. Due to the trims not matching the raised RPM when I disabled over rev the code would set.

Anyhow if you receive a code similar mostly the errors are programming related so try the reset PCV in tools menu and start from a zero map file and enable functions till you find the problem.

Cheers!
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post #3 of 3 (permalink) Old 11-16-2017, 08:47 AM
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Good to hear you found the source and fix and thx for sharing!

Cheers
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