Question about 1998 Honda Prelude

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Prelude 1999 My engine light came on due to Unplugged Knock Sensor. Any idea how to get this fixed?

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Plug back in sensor, after battery has been disconnected. It should clear when battery is reattached.

Posted on Jul 02, 2009

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Bypass knock sensor on 2002 xterra


these are designed to be placed were they are so it will only pick up a knock from the engine and not other things bolted to the engine. just replace the knock sensor were it was designed to work best.

Aug 22, 2014 | 2002 Nissan Xterra

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How do you replace the knock sensor 1 bank 1 on a GMC Sierra 1999?


knock sensor problems arise from ---wiring --poor connections --knock sensor----insecure KS--KS incorrectly tightened ---wiring short to positive --wiring short to ground ---ECM
as you can see , there are more causes than the KS itself so care should be taken in the installation, tightening , wires and make sure that the area is water proof

Jul 30, 2017 | 1999 GMC Sierra

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Hi i have a 2006 56 plate subary legacy saloon 3.0 R B Spec only covered 25,000 miles from new and the EML light has come on due to the knock sensor throwing a fault, also the Cruise control light is...


Hi Lee,
I'm not sure if the programming in that particular vehicle will disable traction control and/or cause the cruise control light to flash because of a faulty knock sensor. There is no way for a repair technician to know all the factors behind the software in your system. You MAY have separate problems with the cruise - then maybe not.

The only thing I can tell you for sure is that Subaru knock sensors are prone to failure due to cracking. The outer shell gets cracks in it and then moisture gets in and corrodes the field windings inside the sensor shorting them out. (SEE PICTURE)

"Reflashing" your computer or resetting the codes will not work if this is the case. You will have to replace the knock sensor FIRST, then reset the computer memory.


10_23_2011_12_35_03_pm.jpg

Oct 23, 2011 | 2006 Subaru Legacy

1 Answer

Occasionally the service engine light will appear for my 1999 Nissan Quest. The code associated is 0325 the knock sensor. Here lately the idle is becoming rougher.


the knock sensors on Nissans are a microphone detector,, which causes a bunch of faulty codes,, There is one knock sensor. Check the connector. Sometimes just disconnecting and reconnecting fixes the fault. Otherwise, it is not difficult to replace. It is a round gizmo attached to the block with a bolt through the center, and an electrical connector on the side. Sometimes this will pop up due to a misfire in (normally ) the number one cylinder,, check the plugs and plug wires,, a misfire will set off the sensor and in turn reflect on the code coming up , I'd do a tune up procedure rather than worry about the sensor,, once tuned,, your idle should be better, and the code should clear

Sep 05, 2011 | 1999 Nissan Quest

2 Answers

What is a knock sensor


here goes for a 1 Tu. this sensor detects detonation in the engine caused by a dirty piston head dirty valves and valve train. When it detects this detonation it tells the computer to ****** the timing so it does not burn a hole in the pistons, at the same tie it tells the computer this the computer adjust the fuel mixture ratio to decrease hot soak detonation which can occur after running the engine getting it hot and turning it off for 5 minutes and causing the gas to pre ignite due to the heat of the engine. This device is made of piezoelectric material which generates a voltage due to sound running threw the knock sensor, Ceramic disks wafered together and it has a preset low and high voltage low voltage is 1.0 DC VOLTS high is 4.0 volts dc WITH 5 VOLTS DC as a reference voltage for testing purposes. to see if it is working tap near the knock sensor and if it is working you will notice a variation in the running of the engine as it changes timing and fuel mix to stop detonation.

Apr 03, 2010 | 1999 Isuzu VehiCROSS

3 Answers

Not shifting into overdrive and check engine light


I'm not a lexus guy , but I'm thinking that you have a vacuum leak somewhere.

Nov 06, 2009 | 1999 Lexus RX 300

4 Answers

Where is a knock sensor for 1998 Mercury Villager located?


Here is a image of it's location, I hope it helps.
8262b2e.jpg

May 18, 2009 | 1998 Mercury Villager

1 Answer

Service engine soon light is on and when hooked up to the computer at auto zone it mentioned a knock sensor issue. Is this common? Also is this something easily changed? It is a 2002 Z71 with about...


The knock sensor is easily replaced. If you look below the passenger side exhaust manifold, you should see it sticking out of the side of the engine block. it'll have an electrical connector, that once unplugged, will allow you to unscrew the sensor from the engine block. I hope this helps.

Jul 29, 2008 | 1999 Chevrolet Silverado 1500

2 Answers

Where is the knock sensor located?


the knock sensor is on the pass side of the motor slightly back from the oil filter on a stand off on the block. tricky to get to but you loose no coolant changing it.

Jul 20, 2008 | 1999 Kia Sportage

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