After replacing the 02 senor the engine won't turn over at all. No click...nothing. All the lights, dashlights and radio work perfectly fine. I had the car sitting at a angle for a couple days to get under it. After replacing the sensor I used a code reader to clear it. Also a red key light is flashing. The car only has 58km,

Any Ideas??

 

car in neutral? depressing clutch fully? check the neutral switch plug to ensure its connected properly

 

Sounds like an immobilizer problem...check the fuses

 

All the fuses look good (i have not checked the big 120a)(but all dash lites and radio and heater works) , the clutch does depress the switch all the way, and the red key light on the dash does quit blinking when I have the key turned to the stage before cranking - still I get no cranking.
By the way, when I changed the o2 sensor I did not disconnect the battery- I dont know if that speaks to this situation or not.

 

I guess I will have to take the switch at the clutch pedal apart and see if that is the problem.

 

front or rear o2 sensor? are you sure you didnt accidentally hit one of the plugs for the neutral switch on the transmission and now its not fully/properly connected?

 

It was the rear o2 sensor that I changed. I went back and looked underneath. -the neutral plug switch looks fine, I dont think I touched it before. I had the car rolled down the lane and popped the clutch and it started right up, drove it around abit and parked it. And its still the same - everything powers up, but it won't turn over.
Any sense of what I should be looking at? -much appreciated.

 

UPdate...I went under once again and jiggled the solonoid wires and tapped it with a wrench...and voila it started! So I guess I narrowed the problem down - thanks for the help, by the by - now im just not sure if its the wires or if tapping it actually did anything.

 

another update if anybody cares...now when I start the car, it seems like there is just a 1/2 second delay from the time I turn the key and the starter actually engages. any ideas. thanks.

 

Definitely sounds like it could be a wire issue, are you comfortable with car electronics? Might be worth tracing the wires and replacing them!

 

likely the starter solenoid. does it click when you turn the key?....if it does it is likely the starter...either way they are a unit so they get replaced together...check all the connections first though