My question is do the sensors for the engine go bad because of the bad capacitors? My thought. From the capacitors leaking on the board would send a spike in the voltage to the sensors. Causing them to possibly not work correctly. I do have a rebuilt ECU with the right capacitors in it. My car does currently have no check engine lights. My 95 ls400 is in need of a new thermostat an I have the 2 new temp and ecu sensors to install as well as the thermostat.

 

I don't think so, but I could be wrong, but, at the same time I think it could cause erratic signals though, also, well lets say you were getting a bad signal from the ecu and it caused your engine to run rich through your 02 sensor. That could make your cat convt go bad. And its not good for the 02 sensor either. If spikes got too bad wouldn't it pop a fuse, or no? Just a thought. My thinking is, it depends on the sensor, how vulnerable any particular sensor is. I like the question.

 

good question and i'm leaning towards no.
to my limited knowledge, the sensor is just senses the signals (one way) and the ECU interprets. the ECU sends voltages to some solenoids to open or close them - i have not heard the ECU sending too much voltage to cause damage.

 

I agree and will 3rd this. lol

No voltage spikes damaging sensors due to bad caps.