05 codes/transmission issue
I'm working on an 05 Malibu with the 2.2 Ecotec that has begun to throw several codes at once and appears to not want to shift into the next gear when attempting to accelerate rapidly. Codes generated are:
P0130 O2 Sensor Circuit
P0134 02 Sensor Circuit No Activity Detected
P0300 Random/Multiple Cylinder Misfire Detected (Pending)
P0420 Catalyst System Efficiency Below Threshold
P0442 Evaporative Emission Control System Leak Detected
The transmission appears to function just fine unless you need to really give the car gas to pass a vehicle, then it will not shift into the next gear. This has happened at both 45MPH and 65MPH, and does not appear to be slipping, but rather simply not firing the solenoid to shift to the next gear. RPM is about 5500 in this instance. If you let off of the gas, it'll shift.
We replaced the transmission fluid and filter this past weekend as both scheduled maintenance and to see if the clutches were burning. The fluid was clean with no burn smell. After a test drive with the same shift issues and a fresh P0300 in pending status, we opted to replace the ignition control module. Things looked good that day, but P0420 is back again today.
The car has 140K on it, runs fine without any misses and does not appear to be impacted by the codes outside of the shifting issue described above. It sure doesn't appear to be a vacuum leak to me, since it runs well at low RPMs. The 02 and temperature sensors seem to be reading correctly, but they are original to the car. I have an OBDII scanner for my laptop and I'm able to get correct readings from all sensors that I can monitor. This motor does not have an EGR or PCV valve.
I'm confident that the codes are related to the shift issue, but I'm running out of ideas fast. Has anyone ever heard of anything like this? Could o2 sensors cause shift issues?