I am getting codes P0131, P0135, and on occasion P0300. Also my ABS light and break warning light also comes on. When I shut my engine down and restart it ABS and break warning lights won't be on, but sometimes they do come back on and I have to turn the engine off multiple times until they stay off. Now keep in mind the ENGINE Light is not on!
Help! Mark

 

You likely have faulty O2 sensor(s), their wiring or connectors, an actual out of bounds air fuel mixture being reported by the O2 sensor(s) caused by say a fuel pump or vacuum leak, a faulty ECM, or another faulty sensor(s) like the ECT sensor leading the ECM to produce an improper air fuel mixture. You will need to narrow this down to be able to carry out a targeted fix.

Do you have scanner with live data capability? If so, what are the fuel trim numbers at idle and 2500 rpm? We need short term and long term trims for both banks. Also what is the ECT reporting. Regarding P0300, it would help to be able to see misfire counters by cylinder. You should also inspect the wiring and connectors to the O2 sensors.

I'll hold off on giving you any further diagnostic steps until you report back. I am a fan of analyze and identify, not guess and parts swap.

George

 

You are awesome and Thank you so much. I will keep in touch.

mark

 

Does your check engine light ever come on? Like when you turn the key on, but don't start the engine? It may be disabled or burned out. A scanner will tell you if the PCM is commanding it to "on".