2000 Nissan Altima camshaft sensor

Hi there,

The chances of the timing chain jumping is quite remote but just to prove the point your mechanic can check the cam reference point quite easily, i would be thinking the the faulty cam position sensor has sent a false signal to the ECU and this has set the code, do you know what the codes were?if so post them here.

mark (mhpautos)

The mechanic is telling me that it mignt not be the camshaft sensor but the timing chain. The two codes that he is getting are: PO340 and P1446. The mechainc needs to remove the cover to inspect the chain and see if it is the chain or the tensor. 5 hours of labor to remove and phyiscally inspect it. Could this be true?

Thanks for your help.
Henry

Hi there,

The P0340 is the cam position sensor, wiring or ECM fault, the P1446 is the EVAP system which is nothing to do with the cam, i would be replacing the sensor, but i will check a manual to see how long i should take to check the valve timing, but 5 hrs seams far to long.

Mark (mhpautos)

Don't want to hijack this thread, but I recommend a better way of checking timing that doesn't involve 5 hours to remove the cover. Use a scope and hook up to the crankshaft and camshaft sensors. Once you get a pattern then compare it to a know good pattern. Should be able to find a good pattern on IATN. HTH.