Question about 1995 Toyota Corolla

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Check engine light is on

Due to scan code is knocking sensor. how to overcome this problem.

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Replace the knock sensor and then clear the code

Posted on Dec 11, 2008

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Engine knocking


engine knocking sound like worn engine bearings or low oil level. if oil level okay more likely oil pump has failed or engine bearings worn out or engine oil diluted with antifreeze or gasoline causing viscosity oil to be too thin.if oil and filter been changed.if you see check engine light flashing code scan for faulty knock sensor. if you see low oil light flashing engine knocking damaged to engine done.

Oct 13, 2012 | 2006 Chrysler PT Cruiser

1 Answer

2000 xterra code p0325 the common issue


It will not pass inspection.
P0325 NISSAN - Knock Sensor Circuit Malfunction xicon.jpghttp://engine-codes.com/p0325_nissan.htmlForum CodePossible causes- Faulty knock sensor
- Knock sensor circuit short to ground
- Knock sensor circuit short to power
- Knock sensor circuit open
- Faulty Engine Control Module (ECM) Tech notes Very common problem with Nissan vehicles. Replacing the knock sensor usually takes care of the problem.

Jul 03, 2012 | Nissan Xterra Cars & Trucks

1 Answer

Have 1999 nissan maxima code #po325 an code#po400 ?dont know what is wrong with car, check engine light on?need help please


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

Sources: W. Farmer - Nissan


P0400 - Exhaust Gas Recirculation Flow Malfunction OBD-II Trouble Code Technical Description

Exhaust Gas Recirculation Flow Malfunction
What does that mean?

The exhaust gas recirculation (EGR) valve is vacuum controlled valve that regulates the amount of exhaust gases that re-enter the cylinders. The powertrain control module (PCM) determines how much based on engine load, temp, and other conditions. If the PCM detects that the amount of exhaust gases entering the cylinder were insufficient or non-existent, this code is set.
FB.init("dd7d9e9681341cde77587bc6a2029f6f"); OBD-Codes.com on Facebook Symptoms

No symptoms will likely be noticed by the driver other than the MIL (malfunction indicator lamp). However, non visible symptoms will be increased combustion temperature and increased Nox emissions.
Causes

A code P0400 may mean that one or more of the following has happened:

  • Plugged EGR passage which restricts the flow of exhaust gasses
  • Faulty EGR solenoid
  • Faulty EGR solenoid wiring/harness
  • Vacuum lines damaged/disconnected to the EGR valve solenoid or to the EGR valve
  • Faulty EGR valve
Possible Solutions

Since EGR valve designs are different, no one test will suffice:

  • Using a scan tool, operate the EGR valve with the engine running. If the engine stumbles, the problem was likely intermittent wiring problem or intermittent blockage problem
  • If engine doesn't stumble, operate the EGR valve manually, if possible. If engine doesn't stumble and die, the ports are likely plugged. Removal of valve and cleaning of all ports will be required
  • Checking of solenoid can only usually be done with a scan tool, because most solenoids operate with a duty cycle of voltage, rather than constant voltage
  • Check all vacuum lines, hoses, etc for any damage
  • Visually inspect the solenoid harness and the solenoid for damage
  • Replace EGR valve

Dec 06, 2011 | Cars & Trucks

1 Answer

2000 outback check engine light on all the time, changed front o2 sensor, changed fuel cap, unplugged battery, and none turn this light off.\r\n any suggestion?


You have to hook an OBD 2 scan tool up to the data link connector and check to see what code is present. If you have a knock sensor code, you need to replace the knock sensor. If you get a P0420: Catalyst system efficiency below threshold, you will need to replace your catalytic converter. But if it is nothing important, the only way to clear a check engine light is with a scan tool. You can usually go to any aftermarket parts store and they will check and clear you codes and light for free. I hope this info helps.

Jul 27, 2011 | 2000 Subaru Outback

2 Answers

Last night my sebring stalled out of nowhere and then the check engine light along with the oil pressure light appeared. There was no unusual knocking sounds or anything. I keep the oil changed and up to...


Get it scanned for the check engine light, (mil light), as for the oil light, thats normal due to engine not running and making no oil pressure. was this a sudden stall, with no engine surging, then I suppect a failed cam or crank sensor. if it kind of stalled with engine surge and hesatation, I suspect fuel related, possible fuel pump. 2.4L, 2.7L engine have same sensor issues and ideas. if you need more info, just reply back with the mil code, I will walk you through this problem.
GOOD LUCK, RDJRP.

Jul 17, 2010 | 2001 Chrysler Sebring

1 Answer

Service engine light on. when checked i get a code that says "knock sensor" and another that says "specific DTC". i need to know what to do about this since i dont know what these codes mean.


Knock sensor codes are very common on Nissan vehicles. This in fact will not set and engine light the onlyway you'll notice it is if the vehicle is scanned and other codes along with the knock sensor code are stored. Can you provide the actual codes that you came up with inorder to help you better.

Nov 16, 2009 | 1997 Nissan Pathfinder

2 Answers

How to reset check engine light


well other than buying a cheapo scan tool at a parts store you can disconnect the battery for about a minute and reconnect it. usually that will do the trick but you may also lose your radio presets. and if the knock sensor problem isnt addressed, the light will come back on eventually

Jan 13, 2009 | 2004 Chevrolet Silverado

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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