Truck Trend Garage: 2004 Nissan Frontier Code P0327

Knock, Knock, Knockin'

Alex Steele
Jan 14, 2013
Q: I have a two-wheel-drive 2004 Nissan Frontier Crew Cab with the 3.3-liter V-6. Code P0327 came up, and I can't find the knock sensor. It's supposed to be on the block under the intake.
A: That's not a quick and easy job. The knock sensor is located in the cylinder valley -- that's the bottom of the V where the cylinders slope down toward the crankshaft. To access the sensor, you have to remove the upper and lower intake manifolds. If you're not a serious do-it-yourselfer, get it to a quality shop. You should make absolutely sure it's the sensor or sensor circuit causing the DTC. The sensor input can be tested at the PCM, first. You can also locate and inspect the knock sensor wire leading into the valley for damage. Keep in mind that knock sensor DTCs are common on several brands of V engines for a specific reason. The valley offers a warm, cozy spot for rats to hang out. Once there, they can't resist chewing through the knock sensor harness.
Photo 2/2   |   KNOCK KNOCK KNOCKIN

How To Reach Alex
If you have a technical question regarding your pickup, SUV, or van, feel free to contact Alex, a master technician with the National Institute for Automotive Service Excellence. Send a letter to him in care of Truck Trend Garage, 831 S. Douglas Street, El Segundo, CA 90245, or e-mail us at trucktrend@sourceinterlink.com. Please include the VIN with your question. Due to the volume of questions received every month, we cannot guarantee that everyone's question will be personally answered or will appear in the magazine.

Can't wait for help with a problem you're having with your Truck or SUV? Ask the expert we trust here at Truck Trend Garage -- visit Alex Steele at www.RealWorldAutomotive.com.

2015 Nissan Frontier Specifications

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Fair Market Price $17,068
MSRP $17,990
Editors' Overall Rating
Mileage 19 City / 23 Highway
Engine 2.5L I4
Horse Power 152 hp @ 5,200 rpm
Torque 171 ft lb of torque @ 4,400 rpm
See all Specifications
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Nissan Frontier

Fair Market Price
$17,068
Editors' Overall Rating
Basic Specifications
MSRP: $17,990
Mileage: 19 / 23
Engine: 2.5L I4
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