Hey guys so my car was sitting for 4 months but I let it run periodically. I changed a ton of things on the car before it was put away:

-spark plugs & wires
-motor mounts
-water pump
-battery
-alternator
-timing belt


The car ran mint but after I started driving it again I got CEL Codes for 02 sensor and a misfire. I figured it was something to do with it sitting, may be moisture in the oil, fuel injectors clogged, so I poured seafoam in the oil, Techron in the fuel tank, reset the ECU and it came back on. Anyone have experience with this?

 

replace. o2 sensors go bad. go to napa and get a denso o2 sensor. denso makes the oem o2 sensors. so therefore your getting oem quailty at 1/3 the cost. mine cost me $76. and honda wanted $280 for it

 

You think the car sitting for 4 months would foul the sensor?

 

it could have already been going bad. typically it doesnt. are the connectors corroded? check those before replacing

 

Havent been able to check. I'm going to bring it up on the lift hopefully tomorrow and inspect everything