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Need help, short term fuel trim sporadic and o2 sensor codes
My 2007 is350 has been spitting codes relating to rich+lean air/fuel ratio for a while (p0172, p0175, p0430, p2197, p0300, p0102, p0113, p0136) I’ve fixed most of them by installing a new maf sensor, all new o2 sensors, cleaned throttle body and pcv valve, and I haven’t seen any vacuum leaks.
Only since recently when the engine is running after a cold start, The idle sounds different and rougher, and the rpm will stay at 1,500 and sometimes wiggle seemingly in tune with the bank 2 short term fuel trim which spikes sporadically up and down between around -25% and 20% trim. eventually it will ease down to around 1,000 rpm and stay there after warming up or a few restarts but the fuel trim will continue to spike
the only codes I have now are p2197 and p0136, but I don’t think it’s a problem with the o2 sensors, I’ve heard a lot of different things online but not anything that truly relates with my issue. But I’m thinking the problem causing the weird idle and o2 sensor codes may be one or more bad fuel injectors??
Anyone with similar problems please share
Any info or solutions on this are needed and would be greatly appreciated
Need help, short term fuel trim sporadic and o2 sensor codes
