my 2006 Spectra 5 with almost 200K. I started throwing a PO030 DTC MIL every few months and after replacing the front Ox sensor, I still had another DTC. 4 months later KMA released this TSB…
my 2006 Spectra 5 with almost 200K. I started throwing a PO030 DTC MIL every few months and after replacing the front Ox sensor, I still had another DTC. 4 months later KMA released this TSB…
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well, the P2237 DTC is a pumping circuit code. Logic is if the Ox sensor
voltage is less than .5 volts or above 4.5 volts for more than 5 seconds it
trips the P2237 DTC. the Ox sensor heater circuit ( PO030 ) could be the
cause, if there’s no TSB for the PO031 DTC for your Kia, then yes replace
the front Ox sensor. Hope this helps.
If I have a p2237 and a p0030 should I start by changing the upstream O2
sensor? Same Kia as yours, my Chevy is a lot easier to find info on….