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Generation III Internal Engine
1997-2006 LS1 | LS6
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Old 04-28-2002, 10:18 PM   #1
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Default PO342, Camshaft Positioning Sensor ?

My car recently died while driving it. The codes that were stored were the 2 for my rear O2s and a PO342 - Camshaft Positioning sensor low input. The car turns over, but wont start. I can hear the fuel pump cycle. I am kind of thinking that I broke the timing chain. Would this code be a symptom of that ?? Where is the camshaft positioning sensor ? Tomorrow I will pull a valve cover and turn the car over. If the valves dont move then that is my problem.

Thanks in advance for the help.

John

<small>[ April 28, 2002, 10:18 PM: Message edited by: TRYMYZ ]</small>
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Old 04-29-2002, 07:24 AM   #2
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Default Re: PO342, Camshaft Positioning Sensor ?

TTT
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Old 04-29-2002, 09:12 AM   #3
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Default Re: PO342, Camshaft Positioning Sensor ?

Yep, had the same thing on friday - timing chain.

If you remove the oil fill cap, you can likely see a rocker enough to realize it is not moving.

You may also notice that it cranks more quickly due to lack of compression in some or all cylinders.
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Old 04-29-2002, 09:59 AM   #4
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Default Re: PO342, Camshaft Positioning Sensor ?

Cool. Not that bad of a swap. it could be worse. Are you running heads/cam.

John
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Old 04-29-2002, 11:20 AM   #5
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Default Re: PO342, Camshaft Positioning Sensor ?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by TRYMYZ:
<strong>Cool. Not that bad of a swap. it could be worse. Are you running heads/cam.

John</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Not that bad <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> I would figure some valves would be stuck open.Which in turn the piston will nail them and bend the valves.

How many miles are on your car?
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Old 04-29-2002, 06:11 PM   #6
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Default Re: PO342, Camshaft Positioning Sensor ?

So far it doesnt appear that I bent any valves. I checked the driver side and the they seem to hold air. When I release the hose all the pressure comes out the fitting in the spark plug hole. I will check the passenger side tomorrow.

John
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Old 04-30-2002, 12:01 AM   #7
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Default Re: PO342, Camshaft Positioning Sensor ?

Take off the oil fill cap.

If you snap a chain you will bend a bunch of valves.

I did that last year.
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Old 04-30-2002, 12:44 AM   #8
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Default Re: PO342, Camshaft Positioning Sensor ?

I had that sensor fail, it's been my only problem so far with the car, Your symptom is exactly what I had and the same code. Pep Boys couldn't figure it out (no code), my friend with a diagnostic couldn't figure it out (no code), the dealer found it in 10 minutes. The tech told me that that code sometimes won't show itself, he changed it out, if I remember correctly it was $43.00 and it ran perfect again. I also had 6 other codes which were coils and wires, but it was all caused by the "Crankshaft Position Censor". Nothing was damaged. However, he said major damage could happen if I kept trying to drive it like that. Mine would both suddenly die or drive OK for a little while (maybe 10 minutes) and then die. Sometimes it wouldn't start for 6-8 tries in a row.

To the dealer.
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Old 04-30-2002, 11:02 AM   #9
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Default Re: PO342, Camshaft Positioning Sensor ?

When I turn the car over the valves dont move so I am pretty sure its the timing chain.
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Old 04-30-2002, 05:05 PM   #10
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Default Re: PO342, Camshaft Positioning Sensor ?

You and Keith live under the same sign? <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
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Old 04-30-2002, 09:58 PM   #11
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Default Re: PO342, Camshaft Positioning Sensor ?

Yeah we do. I just pulled everything out of the car today. Heads, radiator, Cam etc.. The timing chain was definitely busted and I bent at least 2 valves on each side. So the heads are going back to MMS to get setup by them. So is the cam, because I am getting the big daddy 229v2.1. It only took my friend Lino and I 3 .5 hours to tear the car down.

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Old 05-01-2002, 07:57 AM   #12
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Default Re: PO342, Camshaft Positioning Sensor ?

Sorry to here man!

Let me know if you need anything!
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Old 05-01-2002, 07:57 AM
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2001, 342, auto, cam, camaro, camshaft, code, dtc, engine, gmc, obs, po, po342, position, sensor, solution


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