when car sits for a couple of days in humid weather, CEL, VSC and 4WD comes on. error code indicates bad ECM but that is misleading as the exact code has been debugged by someone's experiences on the internet as a bad O2 sensor, error goes away after one day. problem does not occur often which makes me confident the ECM should not be replaced for over $1000.
also symptoms are extremely poor MPG and car has 115K miles with original sensors.
Originally Posted by Shep426
Ok, but where in the OP's info is this stated as the reason for replacing the sensors, maybe this is not the issue. No codes, no symptoms.