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Knock sensor stuck at 0.02v

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Old May 8, 2012 | 06:00 AM
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Default Knock sensor stuck at 0.02v

Just about to start diagnosing my knock sensor/wiring but just wanted to hear from you guys if this is how they typically show signs of failure

Running AEM EMS my knock#1 raw voltage is pegged to 0.02v doesn't matter if I do a pull, rev the car, or use 2step the volts are still stuck on 0.02v

I'm about to check continuity on the wire. Do you guys think the sensor is toast? Anything else I am missing in this picture?
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Old May 8, 2012 | 07:00 AM
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Just ran a continuity test on the wire for the knock sensor. Everything checked out ok. I had a spare knock sensor kicking around(not sure of its condition) but when I plugged it in and ran the 2step i still did not read anything other than .02v on the knock 1 or 2 volts raw.
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Old May 8, 2012 | 08:47 AM
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Are you running E85?
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Old May 8, 2012 | 08:56 AM
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Originally Posted by sohc_mshue
Are you running E85?
94+meth
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Old May 8, 2012 | 10:09 AM
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Sounds like something isn't setup right in the AEM
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Old May 8, 2012 | 10:15 AM
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The knock sensors are known to break quite easily, could you have put a crack on it while working on something in the area?
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Old May 8, 2012 | 11:23 AM
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Originally Posted by Soul Coughing
The knock sensors are known to break quite easily, could you have put a crack on it while working on something in the area?
Sensor visually looks fine. I know what you mean about them being fragile as my spare engine it is broken and my previous engine also had it broken.

The knock volts raw should just read the sensor volts. I can't seem to find anything to adjust this voltage or to give me this stagnant reading?

The knock cal table is only used to set a ceiling for regular engine noise. Doesn't seem to be any settings otherwise for the raw voltage to be reading like this...
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Old May 8, 2012 | 02:09 PM
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UPDATE!!!

Knock sensor ended up being bad! I installed a spare and I am reading knock as normal again

Hopefully this helps other people if they're knock raw voltage is stationary or not reading correctly!
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Old May 8, 2012 | 05:22 PM
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Originally Posted by o'malley_808
UPDATE!!!

Knock sensor ended up being bad! I installed a spare and I am reading knock as normal again

Hopefully this helps other people if they're knock raw voltage is stationary or not reading correctly!
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Old May 8, 2012 | 05:29 PM
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Thanks for the update
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