Started with P0172 (fuel system too rich bank 1) and P0300 (random/multiple cylinder misfire detected) at the same time and very rough idle.
I replaced all four O2 sensors with new NGK/NTK and reset the codes.
The idle was now smooth but after 10 miles of driving I got P0133 (O2 sensor slow response bank 1 sensor 1).
I put the original B1S1 back in, reset the code and drove for 30 miles, all good, so I exchanged the new B1S1 for a replacement.
I haven't put the replacement in yet but after 20 more miles of driving I get P0133 again, P2096 (post catalyst fuel trim system too lean bank 1) and P0440 (evaporative emission system).
I guess the reoccurance of P0133, now with two different sensors, means it not the sensor. The wiring between the sensor and the connector is fine so I doubt it is that. PCM is a WrangerFix so I doubt it is a PCM issue. I suppose the next step is to replace the precats and P0440 just happened to occur at the same time as me changing the O2 sensors as I don't see how it is related.
Andy
I replaced all four O2 sensors with new NGK/NTK and reset the codes.
The idle was now smooth but after 10 miles of driving I got P0133 (O2 sensor slow response bank 1 sensor 1).
I put the original B1S1 back in, reset the code and drove for 30 miles, all good, so I exchanged the new B1S1 for a replacement.
I haven't put the replacement in yet but after 20 more miles of driving I get P0133 again, P2096 (post catalyst fuel trim system too lean bank 1) and P0440 (evaporative emission system).
I guess the reoccurance of P0133, now with two different sensors, means it not the sensor. The wiring between the sensor and the connector is fine so I doubt it is that. PCM is a WrangerFix so I doubt it is a PCM issue. I suppose the next step is to replace the precats and P0440 just happened to occur at the same time as me changing the O2 sensors as I don't see how it is related.
Andy
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