Question about 2003 Chevrolet Suburban 1500

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Location of knock sensor and is it easy to remove?

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KS are always located on the engine block, how hard is it to remove i could not say.
hope this helps

Posted on Sep 24, 2009

  • Herb Jones Feb 28, 2011

    Just got an estimate of $695 to replace both knock sensors with wire harness. Chev dealer claim the harness had a short and caused damage to both knock sensors. Don't know if the dealer can be trusted or not. My Surburban ran just fine with the Service Engine Soon light on.

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Posted on Jan 02, 2017

ilragatzzo78
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SOURCE: knock sensor

The knock sensor threads into the side of the cylinder block.

  1. Disconnect electrical connector from knock sensor.
  2. Use a crow foot socket to remove the knock sensors.
INSTALLATION
The knock sensor threads into the side of the cylinder block in front of the starter.

  1. Install knock sensor. Tighten knock sensor to 10 Nm (7 ft. lbs.) torque. Over or under tightening effects knock sensor performance, possibly causing improper spark control.
  2. Attach electrical connector to knock sensor

Posted on May 15, 2008

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2004 3.0L Escape. Where are the knock sensors located?


Knock Sensor

Print
Operation

The Knock Sensor (KS) is a tuned accelerometer on the engine which converts engine vibration to an electrical signal. The PCM uses this signal to determine the presence of engine knock and to retard spark timing.
Removal & Installation

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  1. Raise and safely support the vehicle.
  2. Remove the tire to ease access to the knock sensor.
  3. Remove knock sensor shield
  4. Remove the connector from the knock sensor.
  5. Remove the sensor mounting bolt,
  6. Now remove the knock senor.
  7. To install reverse the steps above and tighten the bolt to 18 pounds torque.
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Well, let me just say that you have to remove the intake manifold (the one with 6 metal pipes) to remove the knock sensor. It is not easy to remove the intake manifold on Nissans.

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Knock sensor replacement ....2003 kia rio....emissions ...obd II....failure...need to pass inspection...failure code P0325 (Knock sensor 1 circuit malfunction)....where vis the knock sensor located on a...


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A defective knock sensor may cause engine detonation or reduced spark advance and fuel economy. When a knock sensor is removed and replaced, the sensor must be tightened to its specified torque. If the knock sensor is installed tighter than it should be, it may become too sensitive and provide an excessively high voltage signal, resulting in more spark ****** than required. When the knock sensor is installed looser than it should be, the knock sensor signal will be lower than normal, resulting in engine detonation.

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Need to remove the upper and lower air intake manifold.  There are two knock sensors for the front and rear pistons banks.  If you plan to do this yourself it is about 1 to 2 hours.  While you are at it, there is a short coolant bypass hose sitting in the same spot, replace it.  Another problem with the knock sensor is the wire harness used to connect the two knock sensors into one connection sometimes wears out and contacts the metal on the engine causing false signals to the ECM, so replace this cable also.
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Knock Sensor Description addthis_pub = 'car-suff'; button1-bm.gif parts-box-top-lft.gif parts-box-top-rt.gif knock-sensor.jpg parts-box-rt.gif parts-box-btm-lft.gif parts-box-btm-rt.gif A quality Knock Sensor is more important than ever thanks to today’s increasing gas prices. Your Engine Knock Sensor enables your vehicle to obtain the optimum combination of timing and fuel/air mixture to generate power and efficiency and that means less wasted gas. Our guaranteed low prices make us your one-stop Knock Sensor Location. Regardless of the brand, make or model car, truck, van or SUV you drive, we make it easy to locate the application specific Knock Sensor that’s perfect for your vehicle. Our state of the art parts locating system puts you just a few mouse clicks away from the Knock Sensor you need and at a price you cannot beat anywhere. Click. Click. Click. And you are there. In addition to robbing you of fuel economy and performance a faulty Knock Sensor can cause expensive damage to your engine. Remember, the Knock Sensor keeps fuel from detonating in the cylinder … exploding rather than quickly burning as it should. If not replaced a faulty Knock Sensor can quite literally cause hundreds if not thousands of dollars in damage. There is really no need to look any further to find the Knock Sensor that’s application specific for your car, truck, van or SUV – high performance or family vehicle. We’ve got guaranteed low prices and shipping that other suppliers envy. Give us a try, we think you’ll be happy … in fact we guarantee it.

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