20 Most Recent 2002 Nissan Sentra - Page 3 Questions & Answers

if cpk means 'crankshaft position sensor' (ckps), most likely it's shorted.

Where is the starter on my 2001 Nissan Sentra? I have removed the air intake and the battery and everything on that side - I still can't find the starter!

The valve assembly will need removing and inspecting. Possible blown gaskets on assembly or solenoid not working correctly and needs replacing. You tube usually has someone showing how to replace assembly. It's not too difficult, just messy with the fluid.

start the car and look under and make sure it is the pan if it is the pan the bolts are torqued at 12 to 15 pounds maybe a transmission line

Either one of your headlight bulbs has burnt out it's high beam filament (which can be checked by swapping the bulbs over from one headlight to the other and seeing if the fault follows the suspect bulb) or the actual switch on the steering column has fried it's contacts..which means removing the switch assembly and having it overhauled by a good auto electrician, or replaced with a new switch assembly..then it will be good for another 13 years

check out the coolant temp sensor.

NEED A BATTERY WITH MORE COLD CRANKING AMPS.

You may need to take the starter off and have it bench tested.The problem could be the starter drive, or you could have some missing teeth on the flywheel. The drive is supposed to extend when the starter spins to make contact with the teeth on the flywheel. You could also try turning the crank a few inches and try the starter again.

I assume you checked the fuel pressure and it is normal.Are the spark plugs getting spark when it fails to start ?Are you getting injector pulse from the computer ?Any trouble codes stored in the computer ?

Big difference between valve cover gasket and head gasket. To replace head gasket, you must dissamble top end of engine and send the head out to be resurfaced and then install new head gasket. If it is a leaking valve cover it is much easier. Simply dissasemble and then clean valve cover and top of head from all debris and remove all old gasket material. Tighten back down in sequence and do not over tighten. these small bolts can be overtightened easily so go in sequence just like when you tighten lug nuts by skipping one as you go around. 10mm bolts require about 10 pounds or less torque.

have you checked the coils on each spark plug to do this take out one plug attach the plug wire back on to the plug and ground the plug to the motor and have some one crank over the motor but do not hold on to the plug or you could get a strong shock mgsoils

Check the ignition module to see if your getting fire. You can pull off a spark plug wire to check also if you know how to do it

not easy without the proper tools, best to call a locksmith that has the right tools or you can do damage that will cost more than the locksmith did.

Headlamps share a common fuse. If one lamp is not working it should be replaced.

Sounds like relay ground is bad. If supply 12V to relay and meter to ground, you see the 12V potential. If you meter the other side of relay to ground and see the 12V potential, then ground is not connected to that side (but your relay coil is good).

Possible crank position sensor