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Author Topic: More crank sensor woes  (Read 6205 times)

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Enceladus

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Re: More crank sensor woes
« Reply #15 on: 21 October 2019, 14:10:07 »

Sorry, I thought you meant the outside of the sensor was covered in oil. I didn't realise you had already pulled it out.

Bosch (0-261-210-131) 0261310131 is the correct sensor. Although I would have expected to see a GM logo and part number as well?

However the sensor should not be loose in it's bore, once fully seated. It should feel snug. If the sensor is not fully pushed home or is sitting at an angle or can move then the signal will be bad or unreliable.

Under the head there should be an o-ring in a groove. As I recall it's green coloured. This o-ring sits in the top of the bore. Is this o-ring pinched or damaged or displaced? Or maybe you used the o-ring from the old sensor which might be hard and flattened? Or maybe it's not there at all. Or maybe the bore has some crud in it that's preventing a clean fit?

If the sensor is a loose fit in it's bore then that might explain why it worked for two weeks and now doesn't.

And is there enough slack on the sensor cable? To allow for engine movement? Might the cable be broken?
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9jdm

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Re: More crank sensor woes
« Reply #16 on: 21 October 2019, 15:45:03 »

Thanks for the detailed reply. Really appreciate it. I have double checked the whole cable. The bore is clean and the seal good. All tight now. Absolutely dead when ignition turned on. Just get the lights on dash. Still get code 0335. All I can do is try another sensor and if that doesn’t work I think I’ve had enough of it.
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Enceladus

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Re: More crank sensor woes
« Reply #17 on: 21 October 2019, 16:40:27 »

Please ignore the typo in my post above. I meant 'Bosch (0-261-210-131) 0261210131'.

Do you mean the engine won't turn over at all or the engine turns over but won't start?
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TheBoy

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Re: More crank sensor woes
« Reply #18 on: 21 October 2019, 17:16:52 »

Although I would have expected to see a GM logo and part number as well?
I would expect to see this.  Did it come in a sealed GM packet with the GM hologram on?  If not, I'd be suspicious.
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9jdm

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Re: More crank sensor woes
« Reply #19 on: 21 October 2019, 23:02:22 »

Hi guys link to some images. Showing sensor and recess.
https://postimg.cc/gallery/okkqg402/
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Enceladus

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Re: More crank sensor woes
« Reply #20 on: 22 October 2019, 03:50:47 »

The Germany sensor is a Bosch generic 3-wire aftermarket. The Romania sensor is the correct part.  Somebody else had the Bosch Romania made sensor recently and reported it fine. Also supplied via a dealer.

You haven't clarified if the engine turns over or not?

I can't recall for certain but I'm not convinced that a faulty crank sensor locks out the starter. The engine should still turn over but won't start due to no spark. Maybe somebody else can confirm.

Your crank P0335 error will remain until you clear it with a reader or until the engine has been successfully started for the requisite number of times.
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Re: More crank sensor woes
« Reply #21 on: 22 October 2019, 07:40:27 »

No fuel ;), but net result is the same... no signal=no start...
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9jdm

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Re: More crank sensor woes
« Reply #22 on: 22 October 2019, 09:03:34 »

Hi sometimes it turns over. Just tried it and it started. Runs lumpy but will rev no problem. Turned it off. Tried a second time and nothing.
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henryd

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Re: More crank sensor woes
« Reply #23 on: 22 October 2019, 13:06:34 »

Hi sometimes it turns over. Just tried it and it started. Runs lumpy but will rev no problem. Turned it off. Tried a second time and nothing.


When you say nothing do you mean it didn't crank over or it did crank but didn't start ??
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9jdm

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Re: More crank sensor woes
« Reply #24 on: 22 October 2019, 14:33:21 »

Won’t crank. Turn key nothing. Just all the usual lights
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Nick W

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Re: More crank sensor woes
« Reply #25 on: 22 October 2019, 14:58:01 »

Won’t crank. Turn key nothing. Just all the usual lights


that's not a crank sensor issue.
Check the battery and both leads.
Then the starter connections.
Ignition switches fail too, especially if you have a heavy key ring.
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9jdm

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Re: More crank sensor woes
« Reply #26 on: 23 October 2019, 11:34:28 »

Why would I be getting a crank sensor error code then
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Nick W

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Re: More crank sensor woes
« Reply #27 on: 23 October 2019, 12:15:40 »

Why would I be getting a crank sensor error code then


because it only returns a signal when the engine is turning. A stationary V6 will always return a CPS fault code. You can remove the crank sensor from the car, and the engine will crank for as long as there's power in the battery.
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Enceladus

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Re: More crank sensor woes
« Reply #28 on: 23 October 2019, 15:07:05 »

If your crank sensor was loose  but undamaged it might well have generated a new instance of the P0335 fault. Re-seating the sensor might have cured that. However the stored code won't clear until a preset number of good starts is achieved. Might be six, can't remember. Or use a code reader to clear the fault from memory.

The V6 requires the crank signal to trigger the spark as well as the fuel. If there is a signal then the engine might start but run badly. But the engine should always crank. Since yours doesn't reliably crank you have some other fault which needs to be addressed first.

Check the battery voltage. Should be 12.5v or slightly higher at rest/no load. You don't want to see the battery voltage drop below 10v when cranking. Anything less then the starter solenoid might not work which would cause no turnover. If the numbers are any lower then you need to fully charge the battery, with a good charger. Or the battery might have a shorted cell and be scrap. And as suggested by Nick W above check the battery earth, starter connections and the engine earth.

Also the recent torrential rain probably hasn't helped. Did any water get into the car? Via the nearside scuttle maybe? Remove the pollen filter and shine a torch down. Is it wet or muddy?

Have you checked for oil and/or water in the plug wells?
« Last Edit: 23 October 2019, 15:10:25 by Enceladus »
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henryd

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Re: More crank sensor woes
« Reply #29 on: 23 October 2019, 19:16:32 »

Won’t crank. Turn key nothing. Just all the usual lights


that's not a crank sensor issue.
Check the battery and both leads.
Then the starter connections.
Ignition switches fail too, especially if you have a heavy key ring.

Agreed,engine should spin over regardless, your main fault lies elsewhere
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