Last year I took out the IAC valve and cleaned it with MAF cleaner, and that seemed to fix the problem. Until it didn't as these codes started popping up again. "Fuel trim bank 1/2, permissible range exceeded" I sitll don't know what that means and seems like nobody else does either based on my searches.
So, gonna try the following:
- Clean IAC again and goddam I hate getting that thing out and back in. Cut my arms up bad. The old rubber snout thing was still in good shape, so I didn't replace it.
- Ensure no vacuum or air leaks, check all plumbing for cracks.
- Replace CCV (I have a new one sitting in a box because it looks like a pain in the ass to replace without pulling the intake which I def do NOT want to do)
- Replace O2 sensors. What should the voltage on these be reading? I have OBD Fusion and a bt interface that will show the sensor voltages. Pretty sure they're original.
Am I aiming in the right direction?
08-12-2026, 09:43 PM
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