Had the same issue with my '08. Would get the CEL with blinking cruise/SI/traction control. Was coded as P2096 Post catalyst fuel trim back one lean. They replaced the front A/F sensor. No luck. They had replaced the rear O2 sensor and still couldn't figure out the problem. Ended up being vacuum leaks at upper intake gaskets. Haven't had any issue since they have been replaced.
Last edited by Medicinebow; 03-02-2011 at 03:13 PM..