P1157 P0134 DTCs on K-swap

[amlucas92]

Hi Guys

Hope you are doing well. I have a Honda Fit GE8 originally a l15a7, swapped with a K20z4 engine and transmission, running the stock FN2 ecu on Hondata Flashpro.

Mods:
4-2-1 headers
2.5" exhaust
K&N panel filter in stock FN2 airbox

Have replaced the following / checked the following:
- new OEM A/F sensor 1 (only running a primary).
- changed spark plugs
- cleaned MAF sensor
- checked wiring / did continuity test from ecu to A/F sensor and all checked fine
- replaced fuses (IGP, LAF, Fuel Pump fuses)
- checked for air / vacuum leaks
- checked for exhaust leaks

It is worth nothing that these codes pop up from time-to-time and are not permanent. Recently it's been mostly P1157 on its own. It will at times pend and then set after another few cycles.

Are there any other things / steps I am missing, or has anyone else experienced this / similar issue(s)?

[Spunkster]

Have you followed the troubleshooting steps for those error codes in the factory service manual?

[amlucas92]

Hi Spunkster

Yes, that was done, hence me saying that those checks all checks out fine, from the wiring to the sensor itself and yet for some weird reason it still throws the DTC every few days and then clears it on its own again after a day or two.

[Spunkster]

It sounds like there may be an intermittent wiring issue then.