How often should a crankshaft sensor to be changed

T Corolla

How often should a crankshaft sensor to be changed. I have a toyota corolla 2001 and the car is not starting

Row

T Corolla wrote: »

How often should a crankshaft sensor to be changed. I have a toyota corolla 2001 and the car is not starting

Its normally changed when it fails....you need some diagnostic equipment/good code reader with live data to view the rpms when cranking
to check the sensor.

T Corolla

Thanks a million. I had a guy who was able to plug into the car yesterday as the fail failed to start and he noticed that even when the car was turning over there were no revs registering on the equipment. It seems to fail intermittently lately to start and particurarly in very wet weather

Row

T Corolla wrote: »

Thanks a million. I had a guy who was able to plug into the car yesterday as the fail failed to start and he noticed that even when the car was turning over there were no revs registering on the equipment. It seems to fail intermittently lately to start and particurarly in very wet weather

If its intermittant then its worth checking the crankshaft/camshaft sensor
supply cable....sounds like a dodgy connection to me...

T Corolla

Row wrote: »

If its intermittant then its worth checking the crankshaft/camshaft sensor
supply cable....sounds like a dodgy connection to me...

This sounds similar to what he said. Thanks for your help you must be a mechanic or technican of some sort thanks again

T Corolla

I got the car back but the autoelectrician didnt replace the sensor as the car was running and he could'nt find anymore faults. He suggested that there maybe a fault with the fuel filter sensor. Is this fella wasting my time or unsure of what he is doing. I cannot get my head around this. The fault only occurs when there has been heavy rain. Any suggestions will be appreciated PM me if you wish

Row

T Corolla wrote: »

I got the car back but the autoelectrician didnt replace the sensor as the car was running and he could'nt find anymore faults. He suggested that there maybe a fault with the fuel filter sensor. Is this fella wasting my time or unsure of what he is doing. I cannot get my head around this. The fault only occurs when there has been heavy rain. Any suggestions will be appreciated PM me if you wish

Are there any p-codes logged when it plays up...??

T Corolla

What do you mean by P codes. As far as I'm aware the diagonistics show.

Row

T Corolla wrote: »

What do you mean by P codes. As far as I'm aware the diagonistics show.

Engine Fault codes usually start with P..:)
What faults were shown..??

Muckie

P codes are the fault codes, shown on a basic diagnostic machine, then compared to litttle book of answers that come with it .

You mention the rain effecting the starting.

Some cars the MAF sensor can become effected by dampness or mositure particles, especially Golfs.

Really worth getting checked out properly before you send money on getting parts that don't need changing.

T Corolla

Well folks thanks for the help. Strangely enough there are no faults showing because the car runs after a day or two. I had it with a auto electrician today and he was unable to find fault with the car. He took out the spark plugs and checked for dampness but to no avail. He wants to see the car again as soon as possible and with the help of another mechanic they will test it out again. I have a feeling that the fuel pump might be faulty and maybe is not detecting the presence of fuel from time to time and this is something that will not show up on the dashboard.

Nissan doctor

T Corolla wrote: »

Well folks thanks for the help. Strangely enough there are no faults showing because the car runs after a day or two. I had it with a auto electrician today and he was unable to find fault with the car. He took out the spark plugs and checked for dampness but to no avail. He wants to see the car again as soon as possible and with the help of another mechanic they will test it out again. I have a feeling that the fuel pump might be faulty and maybe is not detecting the presence of fuel from time to time and this is something that will not show up on the dashboard.

Any fault that has been registered at any stage should be saved in the ECU so if his diagnostic reader isn't reading them then it must me shi......not very good:P

On the other hand if the are genuinly no faults or recorded faults then its not a problem with the engine electronics.

T Corolla

Nissan doctor wrote: »

Any fault that has been registered at any stage should be saved in the ECU so if his diagnostic reader isn't reading them then it must me shi......not very good:P

On the other hand if the are genuinly no faults or recorded faults then its not a problem with the engine electronics.

I am not familiar with cars in anyway. So what you say is that every time the car will not start this is recorded. Going back to my previous thread am I correct about the fuel pump sensor. I thought maybe I caused the problem as I always allow the car to run down the petrol until the light comes on and ofter drive some time with the light on before filling up again. Could this be labouring the pump and over time cause this.

Row

Its always difficult to get to the bottom of any intermittent fault...But as Doc has said temporary faults usually bring up a fault code which will logged in the ecu this will then lead you in the right direction.

If you are getting a crank/camshaft fault (heading of your post) then there has to be a wiring problem which only arises when water/rain is present.

The next time is doesn't start get some good level diagnostic equipment hooked up and check fault codes..if there are none,check the rpms when cranking...fuel pressure (if possible) check for spark..check condition of immobiliser...etc.
There are plenty of possibilities you just need to get your mechanic to find the correct one..:)
Best of luck.

crosshair1

-No stored fault code.
-No RPM in live data while cranking (and not starting)
I would say its highly likely to be a crank sensor fault

T Corolla

The scearch will contie for the THE FAULT what this space