Re: Cam Sensor is going out need to know the price of...
I had a water pump put on and now the car jerks when you press down on gas and after driving for 15 minutes or so it doesn't want to go when you press on the gas. it keeps jerking until you cut the car off and turn it back on then it will drive normal for a few minutes before it acts up again. i'm wonder what would make this happen sensors. timing chain, water pump?
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I would go and but a cam sensor from the dealer. Aftermarket cam sensors can be slightly irregular. I had this happen to me with an aftermarket ABS sensor on a chevy. The whole problem was a gap difference equal to two sheets of paper. Whats happening is there is an open circuit in your old sensor that causes the check engine light but the new one has a good circuit but bad reading. I would say that is your problem.
I think you need to post a little more information for someone to be of help. Cam Position Sensor and Crank Position Sensor problems are not uncommon on these cars (although you see more Crank Position Sensors go than Cam). Replacing them is not too difficult, if you have some mechanical skill. Just make sure your problem really is with the sensor before you start replacing parts. The sensors cost between $60 and $175 (depending on which and where you purchase it). If you have a specific code that you pulled from an ODB II reader, then start with that. If your check engine light is on, but you don't have an ODB II reader, then try your local parts store. Most will read codes for free.
both sensors involve quite a bit of work to get to, the sensors are (in themselves) easy to replace! CKP(crankshaft position sensor is around $55 at autozone where i live. I cant seem to find the cam position sensor! call your local parts store. they could help with pricing the CKP itself only requires 1 bolt and one wiring connector. Good luck
I'm not a Jag expert, but error code 17 is: P0017 Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor B)
Additional infomation on and cause and possible solutions are here: http://www.obd-codes.com/p0016
Basically, it looks like you have timing issue. Could be the cam or crank sensor or the timing belt.
The P0017 code would imply that you have at least two cam sensors (V6 or V8). The computer thinks that the B sensor cam is out of time with the other cam and the crankshaft. Depending on the cost and location, you might try changing the cam sensor first. The cost to check or replace the timing belt is probably going to be painful.
its best to change cam and crack sensors at the same time, but as for removing engine to change belts thats a no there is a plate in the wheel arch that needs removing to gain access. removing the wheel and you will see the plate that needs removing. belt change is not hard to do. if the cam sensor has failed and replaced and still a fault then its not this at all that is the problem. you can get a false code, and resetting it and running engine to see if it comes up again. also if the garage is using the right equipment it will be able to diagnose a run test this will tell you the full state of the problem so you don't waste money replacing every single part. a failed Maf sensor on some models can make a cam sensor fail as its linked, and that usually just needs a clean with MAF cleaner, this people change the air filter and forget about the sensor. the muck ats on the air filter can get thought to the sensor and give a false reading. also when a part is replaced the ecu needs to be reset or it will say engine faults any were up 60 starts of the engine. so i would have this done. hope this helps. plus if belts lose you would know while running the engine it will squil or make strange sounds. i would recommend another garage if you are going to this one. use a recommended garage, or a garage specialised to you vehicle. changing parts as they think will cost you more money in the long run. good luck with your repair.
If the mechanic pulled a code for a cam sensor, it is very possible that as it gets hot, the cam sensor starts to produce a degraded signal and the engine progressively runs worse. I'd replace the cam sensor without hesitation. The trip to the dealership will cost more than taking an educated shot at the cam sensor.