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Old 06-18-2005, 01:59 PM   #1
R100steve
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Default Crankshaft position sensor

my daughter's 96 SL1 has a service engine light that the mechanic says reads a faulty crankshaft position sensor. I think that's what my daughter said. I know where that is on my Miata and how to change it. Is it easy to fix on a Saturn? Also the code said a transmission temperature sensor was bad. Same thing, is it fixable by the weekend guy?

Steve in Tampa

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Old 06-18-2005, 02:39 PM   #2
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Default Re: Crankshaft position sensor

Is she having starting issues?? Its located on the back at the bottom of the engine above the starter and is a b**ch to get at.

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Old 06-18-2005, 02:46 PM   #3
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Default Re: Crankshaft position sensor

its not that hard if you have a lift and don't mind working on something you can't see.

make sure it is the crankshaft sensor and not the camshaft sensor. a bad crankshaft sensor will normally not throw a code, but instead cause a no start. a camshaft sensor code on the other hand is more common for the S-series.

the TFT isn't that hard, its a two-wire sensor near the tranny fiuld filter.

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Old 06-18-2005, 04:24 PM   #4
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Default Re: Crankshaft position sensor

let's assume it's a camshaft sensor intead of a crankshaft sensor. Where is that located?

Steve

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Old 06-18-2005, 05:29 PM   #5
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Default Re: Crankshaft position sensor

Sierra, you're more knowledgeable than I am, but I've never seen a location for a camshaft position sensor on these cars. I even seen to remember a post from Wolfman stating that the camshaft position was inferred by reading a couple other sensors rather than with it's own sensor. If there is one, I'd really like to know about it. It could be the cause of a problem I'm having. So enlighten me.

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Old 06-18-2005, 07:21 PM   #6
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Default Re: Crankshaft position sensor

The "S" series engines have no camshaft position sensor (in so much as it being an actual part that can be replaced) the "Camshaft Position Sensor" code indicates a MISFIRE, usually caused by:

1. Bad camcover gasket causing oil to pool in the plug wells
2. Bad spark plug wires
3. Misgapped or worn plugs or the use of Platinum plugs in a DOHC engine (gap=.040)
4. Dirty coilpack towers
5. Corroded coilpack to block mounting bolts

...
Old Saturns never die, people KILL them, so check your damn oil!
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Old 06-18-2005, 08:39 PM   #7
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Default Re: Crankshaft position sensor

thanks Wolfman.......I'll check those things. the car has about 90k on it, uses a lot of oil, about a quart every 500 miles, and as far as I know has original plug wires. Does the check engine light need to be reset after these things are done or does it clear itself?

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Old 06-18-2005, 09:48 PM   #8
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Default Re: Crankshaft position sensor

The SES light will eventually clear itself once the problem causing it is fixed. (Within a week MAX) If you don't want to wait, you can clear the code by disconnecting the NEG battery cable for about 30 secs. CAUTION. IF your State has EMISSIONS inspections, and the car is due within the next week or two, allow the code to SELF CLEAR (do not disconnect the cable) As this will also clear the "readiness" codes that enhanced OBD2 emissions inspections need to see for it to pass. These readiness codes will generally reestablish themselves within a few weeks of "normal driving."

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Old 06-19-2005, 12:18 AM   #9
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Default Re: Crankshaft position sensor

for more details about the P0340 and P0341 cam sensor codes on a saturn read here - http://www.saturnfans.com/forums/showthread.php?t=43380

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Old 06-19-2005, 12:18 PM   #10
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Default Re: Crankshaft position sensor

thanks for all the advice. I think changing the plugs and wires will clear things up for me. I reeally appreciate you guys taking the time to help.

Steve in Tampa

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