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Anonymous Posted on Jan 03, 2014

What symptoms does a knock sensor have if its bad

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1996 Infiniti Q45. Can it have no symptoms of knock sensor malfunction and still throw a P0325 code?

Question edited for clarity and all the spelling Errors. Codes are 'capital P-zero', not 'small p-oh'
Question moved to model category.

It is a sensor that is there to look for problems. Your ECM can detect if there is a problem with the sensor.

What Are the Signs of a Bad Knock Sensor?
  • An Illuminated Check Engine Light. ...
  • A Pinging Noise From the Engine. ...
  • Bad Engine Performance. ...
  • Poor Acceleration. ...
  • Power Loss.

What's a Knock Sensor? (+Symptoms of a Bad ... - RepairSmith

Bad Knock Sensor: Common Symptoms and Testing ...

CarParts.com https://www.carparts.com > blog > bad-knock-sensor-c...
Feb 22, 2021 - If the knock sensor fails, the PCM may not recognize or correct spark knock. As a result, you may hear a metallic pinging noise from the engine.

Car knock sensor - function & troubleshooting

Hella https://www.hella.com > Sensors-and-actuators > Car-k...
FAULTY KNOCK SENSOR: SYMPTOMS · Engine warning light comes on · Error code is stored · Reduced engine power · Increased fuel consumption ...
0helpful
1answer

How do you know when the knock sensor goes bad

can be a sensor but also may be lower end damage ---https://oards.com/knock-sensor-symptoms-and-replacement-cost/
0helpful
2answers

Problems when knock sensor is faulty

have you had the OBD codes read ? if the knock sensor is faulty follow this link to a honda owners forum which should help
0helpful
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Car doesn't start after replacing both knock sensors

The car should start without the knock sensors, why would you change the knock sensors? They are a piezo quartz generator that rarely go bad. Usually other symptoms of engine faults produce a code that say there is a knock sensor problem. Back to the no start thing, maybe you may have caused a unrelated problem. Bad reconnection or something. Retract your steps to see if you did something wrong
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1answer

If knock sensor damage can start the vehicle

The knock sensor was designed as a listening device for the vehicle's engine. It is used to detect engine noises such as detonation, when fuel ignites in an engine's cylinder, as well as adjusts the ignition timing when the vehicle is being driven. When a knock sensor is not working properly, it may cause permanent engine damage. Therefore, there are various symptoms to aid in recognizing a faulty knock sensor.

Check Engine Light
Engine Noises
Additional Symptoms
Careucar
1helpful
3answers

Diagnostic code po325 what does this mean

Hi the error code relates to the PCM Knock Sensor Circuit

A knock sensor tells the engine computer when one or more of your engine's cylinders are "knocking", that is, exploding the air/fuel mixture in a way that delivers less power and can be damaging to the engine if prolonged. The computer uses this information to tune the engine so that it doesn't knock. If your knock sensor wasn't operating properly, so that it was always indicating a knock, the engine computer's response may have been to change the ignition timing on your engine. The knock sensor generally threads into the engine block. This P0325 code may show up intermittently or the Service Engine light may be lit constantly.
Symptoms

You may notice drivability problems including a lack of power and perhaps some hesitation. There may also be other symptoms.
Causes

A code P0325 most likely means one or more of the following has happened:

* The knock sensor is faulty and needs to be replaced
* There is a wiring short/fault in the knock sensor circuit

Possible Solutions

* Check the resistance of the knock sensor (compare it to factory specs)
* Check for broken/frayed wires leading to the sensor
* Replace the knock sensor

Hope this helps
Steve
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1answer

I have a 2004 pilot, VTS4 and engine light came on. i have a p0325 knock sensor circ. bank A. just replace the sensor?? also i can seem to find any diagrams. any help appreciated!!!

It does sound like the sensor may be bad, but you also need to check the wiring.
This information comes from:

http://www.obd-codes.com/p0325

P0325 OBD-II Trouble Code Technical Description

Knock Sensor Circuit Malfunction
What does that mean?

A knock sensor tells the engine computer when one or more of your engine's cylinders are "knocking", that is, exploding the air/fuel mixture in a way that delivers less power and can be damaging to the engine if prolonged. The computer uses this information to tune the engine so that it doesn't knock. If your knock sensor wasn't operating properly, so that it was always indicating a knock, the engine computer's response may have been to change the ignition timing on your engine. Knock sensors generally bolt into or thread into the engine block. This P0325 code may show up intermittently or the Service Engine light may be lit constantly. Other knock sensor related DTC codes include P0330.
FB.init("dd7d9e9681341cde77587bc6a2029f6f"); OBD-Codes.com on Facebook Symptoms

You may notice drivability problems including a lack of power and perhaps some hesitation. There may also be other symptoms.
Causes

A code P0325 most likely means one or more of the following has happened:

Possible Solutions
  • Check the resistance of the knock sensor (compare it to factory specs)
  • Check for broken/frayed wires leading to the sensor
  • Replace the knock sensor
0helpful
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I have a 97 svx and have no knocking noises or any symptoms of the knock sensors being bad or out, but yet i have a code for the knock sensor and a code for pedal placement coming up. How can i fix this...

Knock sensors are known problem!!!!!!!!!!!
Usually can fish them out with out removing manifold there are TWO
What codes exactly...
disconnect batt @ 30 min restart car may erase codes
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