CHECK ENGINE LIGHT

Isuzu

Tiny

jonesledzep

April, 28, 2007 AT 7:37 PM

1994 Isuzu Rodeo 4wd 3.2L 173,000 miles. When I drive for a long period of time, after about 30 minutes my check engine light comes on and I notice reduced power and excess fuel consumption. If I reduce the engine to Idle RMP, the light turns off, but when I resume to cruising RPM the light comes back on. All my gauges read ok and nothing sounds out of the ordinary. I retrieved codes 23, 32, and 44. These are Intake Temperature Sensor, EGR system, and O2 Sensor Lean Exhaust respectively. What would cause all of these sensors to report these trouble codes at the same time? I am sure that these are not on seperate occasions because I was sure to clear the ECM before driving and testing. I have also checked for obvious vacuum leaks and couldn't find any. Thanks for your help

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