Hello,
my Chevy Express RV is starting to throw a P0327 code.
First I started the parts canon, - new pigtail and new AC-Delco sensor. No change - potentially even more frequently....
Then I found here in Forum the Manuals. - thanks for this.
I'm following the troubleshooting Guide DTC P0327 Knock Sensor Noise Channel Low Voltage.
Step 1: DTC is set - YES
Step 2: Failed this Ignition: Yes - got to Step 4
Step 4: 100K Ohm. - yes
Step 5: I don't have something to measure frequency
Step 6: Knock sensor has 0 Ohm to Alternator Ground.
Unplugged PCM harness from PCM - checked KS-Pigtail - indefinite Ohm- so I do not have a ground short.
Step 7: Ignition ON - Knock Sensor connector 0.4V - should have 5V reference ?? This is a single wire sensor
Ignition Off 0.0V on knock sensor connector.
I've check my pigtail connection and I have the same voltage before the pigtail repair. So it seems like I'm loosing voltage somewhere.
Next the guide says - remove VCM C2 connector and check connectivity. I got a 0411 PCM from Workhorse in the RV.
There a bunch of dark blue wires in the C2 connector.
Which one is the Knock sensor?
my Chevy Express RV is starting to throw a P0327 code.
First I started the parts canon, - new pigtail and new AC-Delco sensor. No change - potentially even more frequently....
Then I found here in Forum the Manuals. - thanks for this.
I'm following the troubleshooting Guide DTC P0327 Knock Sensor Noise Channel Low Voltage.
Step 1: DTC is set - YES
Step 2: Failed this Ignition: Yes - got to Step 4
Step 4: 100K Ohm. - yes
Step 5: I don't have something to measure frequency
Step 6: Knock sensor has 0 Ohm to Alternator Ground.
Unplugged PCM harness from PCM - checked KS-Pigtail - indefinite Ohm- so I do not have a ground short.
Step 7: Ignition ON - Knock Sensor connector 0.4V - should have 5V reference ?? This is a single wire sensor
Ignition Off 0.0V on knock sensor connector.
I've check my pigtail connection and I have the same voltage before the pigtail repair. So it seems like I'm loosing voltage somewhere.
Next the guide says - remove VCM C2 connector and check connectivity. I got a 0411 PCM from Workhorse in the RV.
There a bunch of dark blue wires in the C2 connector.
Which one is the Knock sensor?
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