996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

P0327 knock sensor

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Old May 5, 2016 | 05:03 PM
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P0327 knock sensor

I'm getting a code on my tuner says low voltage knock sensor

Should I start tearing the car down to check the wiring for breaks? Order a new knock sensor?
Please help
 
Old May 6, 2016 | 07:13 AM
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Very interesting never seen that code before.

Bad sensor it sounds like.
 
Old May 6, 2016 | 08:51 AM
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From the forums I've read sounds like these sensors don't go bad. I also called my local shop and he said that 90% of the time there is a break in the wires. Possibly rodents.
 
Old May 7, 2016 | 12:30 PM
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Originally Posted by Winsor Patterson
From the forums I've read sounds like these sensors don't go bad. I also called my local shop and he said that 90% of the time there is a break in the wires. Possibly rodents.
Reads like you have answered your own question. A sensor failure is rather remote -- per you. I have no real experience but do not recall having come across that many (any?) reports of failed knock sensors.

That leaves a bad connection/connector, or a bad wiring.

For a bad connection you'll have to try to examine the connection/connector. In some cases a careful disconnect then reconnect can remove surface corrosion and eliminate the symptoms.

With bad wiring rodent damage is always a possibility. The one Turbo I came across in for what proved to be rodent damage had to have its engine removed in order to replace the damaged components/wiring harness. The owner had to turn this over to his home owner insurance.

Rodent sign should visible even if you don't see the actual damage to the wiring right off. Look on top of the engine, on top of the plastic under body panels for rodent nesting trash.

You'll have to run your fingers along the wiring harness feeling for any roughness where rodents can have gnawed through the wiring insulation.
 
Old May 7, 2016 | 10:05 PM
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Originally Posted by Macster
Reads like you have answered your own question. A sensor failure is rather remote -- per you. I have no real experience but do not recall having come across that many (any?) reports of failed knock sensors.

That leaves a bad connection/connector, or a bad wiring.

For a bad connection you'll have to try to examine the connection/connector. In some cases a careful disconnect then reconnect can remove surface corrosion and eliminate the symptoms.

With bad wiring rodent damage is always a possibility. The one Turbo I came across in for what proved to be rodent damage had to have its engine removed in order to replace the damaged components/wiring harness. The owner had to turn this over to his home owner insurance.

Rodent sign should visible even if you don't see the actual damage to the wiring right off. Look on top of the engine, on top of the plastic under body panels for rodent nesting trash.

You'll have to run your fingers along the wiring harness feeling for any roughness where rodents can have gnawed through the wiring insulation.
That's the part I can't figure out, the car has always been garage kept and is super clean. So I'm guessing that the connector failed or is corroded. I'm trying to find time to tear the engine down now. I replaced my diverter valves but haven't removed the alternator. Not sure how I depth this will be?
 
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