Question about 1996 Nissan Maxima

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Knock sensors can knock sensors car not idle properly and stop when brake is aplied

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Yes replace.

Posted on Jul 25, 2013


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Posted on Jan 02, 2017

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SOURCE: there is a knock when the brake is aplied drivers

sounds like loose caliper pins or bolts could be caliper bushings.

Posted on Jan 13, 2010

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What could be the problem when I aply brakes pedal gets real hard where car wont stop when braking coming to a stop brk. light and abs lights on

Hey Joes, 1 problem at a time ,if brake light is coming on that is in the proportion valve ,did you have to push reset button to make light go out,? if the ABS lite is coming on what you can do to check and see if that is the problem is unplug it and try brakes ,it will deactivate ABS and give you normal braking and ABS light will be on ,see if symptyms change , also did you reset ABS sensors to the tone wheel when you replaced rotors ? I don't know what you have and I have seen some cars need a importaint reset procedure for abs to work properly. good luck I hope I gave you some good things to look at that help you.

Oct 28, 2014 | Cars & Trucks

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My car is misfiring

I own a 2000 avalon and had a similar issue, rough idle especially when stopped, car felt like it was going to stall. I had a couple error codes which included one of the o2 sensors and knock sensors. I replaced the pcv valve , and o2 sensor, both easy fixes, but tue knock sensor is in the top half of the engine. Cost me 500 bucks to replace, install knock sensor at shop. After knock sensor was replaced and other o2 sensor replaced, no more idle issues. What happens if an o2 sensor on one of

Mar 02, 2014 | 2000 Toyota Avalon

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While driving the car runs fine, but when stoping at a stop it idles rough and try to cut off. pulled code gave code p0325. I changed the knock sensor but still gets code p0325, and car still misses at...

Hi Thomas,
We have a couple different issues here.
First, your Maxima is either NOT a 1995 model, or it is a very late 1995 model that "thinks" it's a 1996. The reason I say this is because a 1995 model Maxima is NOT OBD compatible and is not capable of outputting "P-codes" to a generic OBD scanner.
Those Nissans that were claimed to be OBD compatible in the late 1995 model year only output certain codes. To find out the rest of the story, you still need a scanner that has software capable of accessing the engine computer through the Nissan-2 connector (usually in the fuse block area).
Then you need to understand about Diagnostic Trouble Code (DTC) P0325.
This code does not necessarily mean that you need a new knock sensor. I think you will be a little less confused if you know the facts. What you need to know about ALL fault codes is that they NEVER tell you what parts to replace. Fault codes only tell you that the computer has a problem with one of the many circuits and systems that it monitors. The fault code will tell you which system is failing or which circuit is failing. They DO NOT tell you what is wrong with the circuit or system that it is reporting. The person diagnosing the vehicle is supposed to figure that one out.
Most people think that "diagnostics" means plug in the "magic box" and replace everything the computer tells you to replace. I WISH it was that easy!
Now that you know all of this, we can examine the code itself. What causes this code to set? ...I'm glad you asked. The computer controls the ignition timing in your car. The trick is to advance the timing as far as possible (for more power and efficiency) while not advancing it too far, which will cause pre-detonation (also known as "ignition ping"). Pre-detonation can cause serious engine damage, including burning holes through a piston.
Here is where the knock sensor comes in.
SCENARIO 1: The computer advances the ignition until the knock sensor "hears" an ignition ping. When this happens, the knock sensor sends a signal to the PCM to let it know that the engine is "knocking". So the computer responds by retarding the timing a little to stop the knock. When the knock stops, the knock sensor will stop sending a knock signal to the computer.
DTC P0325 sets when the computer has ******** the ignition timing as far as it possibly can and the knock sensor is STILL sending a knock signal.
SCENARIO 2: The computer also tests the knock sensor by deliberately advancing the timing too far for a few seconds to see if it gets a signal from the knock sensor.
So, P0325 can also set if there is NO signal from the knock sensor when the computer is EXPECTING a signal.
For scenario 1, the cause is usually a mechanical knock in the engine. Loose timing belts, worn/loose timing chains worn distributor shafts, bad pulley bearings, etc. The knock sensor does not know the difference between a knock caused by pre-detonation and a knock caused by a loose valve lifter (or other mechanical reason). The knock does not go away when the timing is ******** because the knock is not CAUSED by timing....code P0325 sets.
For scenario 2, the cause is usually either the knock sensor itself or a problem with the wire between the knock sensor and the computer or the knock sensor is not grounded properly. These things will cause the knock sensor to not be able to get a message through to the computer....code P0325 sets.
Now, the misfire at idle is a whole other issue. The computer will default to base ignition timing settings if there is a knock sensor fault. You may notice a little loss of performance, particularly during heavy acceleration, but there is NO WAY that your knock sensor is the CAUSE of ANY misfire - especially not at idle. However, it is VERY possible that whatever is causing the misfire could also be the cause of the knock sensor code.
Basically what I am saying here is that you need to put the knock sensor problem "on the back burner" until you find out what is causing your misfire. Unfortunately, misfires can be cause by a LOT of different things ranging from a bad spark plug to a cracked cylinder head or worn-out piston rings. The misfire simply has to be diagnosed using the proper procedures to avoid replacing a bunch of things that will not fix the problem.
With all that said, WHEW! I hope you got through all that!
The older Nissans are notorious for the distributor shaft bushing going bad and causing a loud "rattling" noise. The movement of the shaft can cause a cylinder misfire, and the rattling can cause a knock sensor code to set. I have fixed many of the Nissan V-6 engines with this same problem by replacing the distributor. This is the FIRST place I would look. If your distributor is not rattling, try revving the motor just a little and see if it rattles. If it does, replace it. If it does not, let me know and we will look elsewhere for the cause of your problem.
-Dave (dttech)

Nov 19, 2011 | 1995 Nissan Maxima

2 Answers

Car stalls when ever you come to a stop or slow down a diagnostic revealed several possible causes 1. knock sensor 2. 02sensor and 3. idle control

Knock Sensor - is not an issue
O2 Sensor-just sees the condition of exhaust, during the stall & sets a code

I would look at the Idle Speed Motor, TPS Sensor,even vacuum leaks,Egr Valve.
Don't know your veh systems, Hope that helps some.

May 01, 2010 | 2000 Daewoo Lanos

1 Answer

There is a knock when the brake is aplied drivers

sounds like loose caliper pins or bolts could be caliper bushings.

Jan 13, 2010 | 1996 Nissan Altima

1 Answer

Cut off

I suggest you to check your brake boster if there is air leak, to do this, start the engine, press the brake and hold. Observe the engine idle while you are holding down, if the engine become running roughly or engine cut off, it means you have to replace brake boster. but if this procedure doesn't make sense, try to knock the fuse housingseveral times while the engine is running if the engine.if cut off while knocking, most probable there is loos fuse or relay. secure all the fuse and try to knock again, if the problem still excesting, try to wigle in deferent direction the wire loom around the engine bay especially the wire harness of crank shaft and cam shaft sensors while the engine is running. if stil can't find the problem check the ignition switch harness try to wigle as while. if the problem occure while wigling the wire harness definitely you have loose connection.

Mar 09, 2009 | 1994 Honda Accord

1 Answer

2008 Ford Edge engine surge while stopped in gear

Sounds like a faulty Throttle position sensor. Warranty should pay for parts & damage, talk to your dealer. The 88 -90 ford tempos had same problem & a driving school was using them, lots of kids & instructors got the heck scared out of them, but luckily no-one injured badly.

Jan 25, 2009 | 1986 Oldsmobile Cutlass Supreme

1 Answer

A.b.s. 2005 1/2 4 wheel drive silverado

YOUR ABS KICKS IN right before you stop? you have a wheel speed sensor dropping out at low speeds this is causing the abs unit to think one wheel is locking up activating system. need to have a scan tool on it to see which one is dropping out

Dec 01, 2008 | 2005 Chevrolet Silverado 1500 2WD

1 Answer

Adjusting idle speed ae100 corolla

What is the question, the idle speed or the knock sensor? The idle speed is not adjustable, it is computer controlled, if it has a stalling problem then the idle speed control valve is dirty.
The Knock sensor is just that, it senses what some people call spark knock, some pinging and others cylinder detonation, it sends a signal to the computer that the engine is knocking and the timing is then retarded until the knock stops, it can not completely stop knock but in most cases it controls it well as long as the engine is in good condition and the right grade of gas is used.

Nov 21, 2008 | 1993 Toyota Corolla

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