Question about 1993 Subaru Legacy

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Knock sensor? cause of engine light staying on

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Or an o2 sensor. Take it in to a mechanic for a diagnostic. the computer will tell you exactly what the problem is. You used to be able to rent them and do it yourself at auto parts stores, but where I live (CA bay area) you can't anymore. Lots of places apply the diagnostic fee to the repair costs. Make some calls and shoo proud first. It definitely won't turn off on its own though.

Posted on Aug 24, 2010

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What is code 325


P0325 - Knock Sensor Circuit Malfunction
Possible causes- Faulty knock sensor
- Knock sensor circuit short to ground
- Knock sensor circuit short to power
- Knock sensor circuit open
- Faulty Engine Control Module (very unlikely).
P0139 - O2 Sensor Circuit Slow Response Bank 1 Sensor 2

Possible causes- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Faulty Rear Heated Oxygen Sensor Bank 1
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

Sep 27, 2012 | 2000 Mercury Villager

1 Answer

I replaced the knock sensor, what else could be causing acceleration problems on hills?


The knock sensor code does not always mean the sensor is faulty.
The sensor picks up noise and vibration in the engine such as a spark knock would generate, and the computer slows down the spark timing to fix it. If the noise or vibration continues, the code is set.
Could be a noisy valve, or a problem with the crankshaft or other component.

Aug 13, 2012 | Cars & Trucks

2 Answers

Car is knocking and was low on oil cold it be the knock sensor out no oiland water mix in the oil


did the oil light come on? it it did that means a low pressure situation which can cause con rod bearing damage. the knock sensor can cause that too.

Sep 25, 2011 | 2001 Dodge Stratus

2 Answers

What causes a p 0327 diagnostic code on a 95 contour


P0327 - Knock Sensor 1 Circuit Low Input Bank 1 or Single Sensor
First check the knock sensor connector. If the connector is clean and secure, replacing the knock sensor usually takes care of the problem.

- An excessively low voltage from the sensor is sent to Powertrain Control Module (ECM) or Engine Control Module (ECM)

The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the Powertrain Control Module (PCM) or Engine Control Module (ECM).

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power

Possible causes
- Knock sensor circuit short to GND.
- Knock sensor circuit short to PWR.
- Knock sensor circuit open.
- Damaged knock sensor.
- Faulty Powertrain Control Module (PCM) or Engine Control Module (ECM).


Test and check it. Hope helps.

May 12, 2011 | 1995 Ford Contour

1 Answer

How do I replace a knock sensor for a 1992 toyota camry v6 le


First, I would like to mention that most knock sensor codes are not caused by the knock sensors, but a mechanical problem with the engine. The knock sensors cannot differentiate between noises caused by mechanical problems like a bad pulley bearing, bad motor mount, noisy alternator bearings, etc. and spark knock. knock sensor codes are set when the computer has retarded the timing as far as possible to compensate for ignition ping (Spark Knock) and the noise still exists.

With that said, here are the instructions.

Remove the Intake Chamber assembly.
Disconnect Injector connectors.
Disconnect the heater hose from the Intake Manifold.
Remove the 9 bolts. 2 nuts, 2 plate washers and Intake Manifold assembly.
Remove right hand engine mounting stay and water outlet.
Disconnect the following hoses and connectors:
Radiator inlet hose.
Engine coolant reservoir hose.
Engine Coolant Temperature Sensor connector.
Engine Coolant Temperature Switch connector.
Ground strap connector.

Remove the 3 bolts and right hand mounting stay.
Remove the wire band.
Disconnect the water bypass hose from the inlet housing.
Remove the 2 bolts, 2 nuts, 2 plate washers and water outlet.
Remove the 2 gaskets.
Disconnect the Knock Sensor connectors.
Remove the Knock Sensors.



Dec 02, 2010 | 1992 Toyota Camry V6

1 Answer

Service soon light stays on.. had it checked at auto zone and came up with po327 knock sensor condition. Is this gona be an expensive car repair?


no, 30 minutes labor--you can do it yourself. part is $30. You have 2 of them. 327 is for bank 1, which is the back bank by the firewall. see picture below (the picture is bank 2, but location is same on other side).

To replace the knock sensor:
  • Disconnect the knock sensor wiring connector.
  • Then, unscrew the sensor.
  • Remove the knock sensor.
  • Reverse the procedures to install the part.
  • fed2730.gif
      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.

    Oct 12, 2010 | 1999 Pontiac Grand Am GT

    1 Answer

    Engine management light stays on car dries great been well serviced no unusual knocks


    something like O2 sensor will cause the check engine light stay on, not too worries,or you may take it to dealer did a service.(the light may stay on on that year model even after service.)

    Jun 03, 2010 | 1994 Volvo 850

    1 Answer

    Engine check light keeps coming on and stays on.i had the car diagnosed the mechanic said that the knock sensor is dad and i need to get a new knock sensor so i bought a new knock sensor put it in and it...


    did you have the check engine light reset after replacing it? if not then go to auto zone, and let them know you replaced it and need to reset the trouble light for the check engine light... hope this helps...

    Apr 14, 2010 | 1995 Toyota Corolla

    2 Answers

    Check engine light keeps coming on...test says its from the knock sensor...sensor has been replaced, but check engine continues to come on...have always used premiun gas...do have a airaid cold air...


    it could be that the wiring to or from the knock sensor has a prob. also after the knock sensor was changed was the code cleared? if it was not it may be a inactive code that stays in the computer causing the light to stay on...

    Aug 01, 2009 | Jeep Wrangler Cars & Trucks

    1 Answer

    Knock sensor circuit problem


    Well, you have another issue besides a knock sensor problem. A knock sensor code WILL NOT illuminate the check engine light. Check for other codes stored in the ECU. I have seen oxygen sensor issues cause knock sensor issues due to inaccurate fuel delivery resulting in engine ping at all times (causing the ECU to think that the knock sensor is bad because it's reporting ping at all times) - but also had codes for one or more O2 sensors.

    Nissan Scope Technician- 10 years with Nissan

    Oct 26, 2008 | 2000 Nissan Frontier

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