[z3papa]

I had increased emissions CEL go off and on in the past few months until finally going on permanent with a few limp modes. I can tell you chasing this ghost can be frustrating and expensive. I first replaced the fuel pressure sensor, then replaced both actuators, and still the problem persisted. I ultimately replaced the passenger side 02 sensor and spark plugs and have been problem free for a week now. Car is pulling much stronger. I've read it can also be secondary air pump or the check valve for the pump and a few other suggestions.