2006 Limited NA Coupe 72000 miles. My CEL light came on about 2 weeks ago, car is running fine. First thing I did was disconnect neg battery term for a while then reconnect. CEL went out but comes back on after approx. 3 starts and around 30 miles of driving. I did this several times. Had the codes read at Autozone P2096 & P2098. Took it to O'reillys their scanner couldn't link up. Took it to Advance and they got the same codes as above.
Checked fuel pressure at the fuel rail and it was ~55 psi but slow to recover after revving engine. Replace the fuel filter/regulator no change but recovery was great after revving. Just replaced both rear O2 sensors Bosch OEM no change. Same condition, around 3 starts and 30 miles and the CEL is back. Scoured the net and this forum and not getting any joy as to what it could be. Checked every fuse in the car with a meter, checked all O2 connectors. Checked for vacuum leaks, exhaust leaks all is good. I'm thinking running lean on both banks will fry the cats so I want to get this repaired asap. There is no soot in the exhaust tips at all so I'm pretty sure it's running lean. Battery is original Varta and seems to have no issues.
Have done the me so horny mod, and resoldered the Relay Control Module suspect cold joints about a month ago and really don't suspect the mods to be the issue just throwing it in to cover all bases. Took the RCM out yesterday took a hard look at it and all looks good. Removed all five contacts in the RCM and cleaned the contacts. Only two had a little black from arcing other three looked fine. Metered all resistors in the RCM all good. Put it all back together went for a spin and no CEL. Took her out again for another run and no CEL. My Permagrin was returning. Took her out again this morning and of course the CEL is back on, 3 starts and around 30 miles. Scratching my head here and thinking I will pull the MAF this morning to give it a good look and cleaning. The nearest dealer to me is waaay to far to go to and I trust my skills and this forums skills more than I do theirs. I'm open to any suggestions you guys may have. I have a new crank position sensor as a spare but hesitate to install it as I don't think it would make the car run lean?? Help!!! I want my baby back.
Mark