so i searched the forums and i couldn't find the answer to this question ...if one sensor fails like my crank sensor did will it make others fail or at least show failure codes ... any kind of help would be greatly appreciated .
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02-26-2011
so i searched the forums and i couldn't find the answer to this question ...if one sensor fails like my crank sensor did will it make others fail or at least show failure codes ... any kind of help would be greatly appreciated .
03-21-2011
I actually have the same problem in my 97 right now.
I've been told by a few people that if your Crank sensor is going out or quits working while your driving, that the Cam sensor will take over seeing how they both basically do the same thing.
As far as if it will make other sensors go bad, I'm not sure. Quite possibly though. Just be sure to replace them both when you get it fixed just in case, plus the Cam sensor is right above the Crank sensor so may as well do them both so you don't have to take it apart more than once.
03-21-2011
It may show other codes as the PCM is not getting the right info it needs to make the car run properly.
As far as the CAM sensor taking over if the Crank fails, I don't see how that would work. IIRC when the CRANK sensor fails the motor will shut down, seeing as how it cannot send a signal to the rest of the car which dictates timing, fuel, iginition firing, etc... How can a car run without knowing which cylinder to fire and in what order? On the other hand I learn something new everyday, so maybe this is my new lesson???
03-21-2011
Crank rotates 2 times for every 1 of the cam. Crank sensor tells top dead center of each cylinder bet cam sensor let's it no when it is an Exhaust or compression stroke. Engine can run without cam sensor because coil packs fire 2 cylinders at the same time, correct cylinders. I had a 91 3800 that threw the magnet off cam gear but still ran. Please note that the fuel injects may not be pulsing at the correct time, 50/50 chance, but the engine will still run less efficiently. I do not believe engine will run without crank sensor but I don't know for sure.
03-22-2011
One sensor failing should never hurt another sensor on the motor. When one sensor fails it may cause things that could cause other faults to appear.
For example you mention the crank sensor. Mine never died and needed to be restarted, but it did hiccup (technically a stall and restart on it's own). When it did this, the shifter light would blink on the console, the pcm tossed a code for being started in gear (which shouldn't be possible) and a few other funky related things happened. All could be tied back to a stall once that part was figured out.
If you suspect the crank sensor is failing and since it's a common issue, swap it out first. Then see if the other issues clear up because they were based on the bad crank sensor.
03-22-2011
hey thanks for all the info guys it was the crank sensor and the ignition module that went out replaced them both and now shes running like a champ
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