4.9 help please
check engine light came on today and this is what I got for codes. I plugged the code reader in and the check engine light was on but as soon as I hit scan it went off. Thanks in advance for anyone willing to help.
KOEO
67- A/c on during KOEO or neutral drive switch open or manual lever position sensor out of range or neutral (its a standard and was in neutral)
Memory
11- system pass
KOER
41- No exhaust gas oxygen switching detected- always indicating lean
25- knock sensor not detected during dynamic response KOER
Help me please I've been fighting this for years on and off and can't put a finger on it. can someone please give me specs on what the O2 sensor resistance is supposed to be. And what the EGR Valve solenoid should be doing at idle, plus the resistance on the sensor and the amount of vacuum that should be going in and coming out.






