UK Car Repair Questions? Ask a Mechanic for Answers ASAP
Hi, my name is ***** ***** you have a scanner to read the millivolts of the o2 sensors?
yes I can with the IDS I guess?, what do you want to read me, open loop or closed loop?
with the key on, engine off, both upstream o2 sensors should read below 100 millivolts, do they?
is says1.66 Volt on both upstream sensors
Ok, then this isn the problem, unplug both the upstream o2 sensors, and see if the reading drops below 100 millivolts, on the scanner, can you do this?
Same result Tim, 1.66V on both sensors
ok, then there is a problem between the sensors and the computer, we see alot where moisture gets into the connector at the computer, and it will cause a small voltage bleed of to the wires going to the sensors, can you remove the connectors at the computer and clean them off and blow them out and see if the voltage drops to below 100 millivolts?
wich connector should I have the upper, middle or lower?
Ok, well I cleaned all 3 of them but no result still1.66V
then you need to ohm out both wires betwen the ecu and the sensors, check for both an open circuit and a short to ground, it hs to be either a bad wire, or the ecu you replaced is defective, nothing else,Tim
Ok let me try that, thanks.
Anytime my friend, please dont forget to rate me, so I can get credit for helping, thanks,Tim