Question about 2004 Kia Rio

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Was told I need new knock sensor due to check engine light on & noticed my car lost its power. Was it caused due to the overheat? Read description to let me know what you think. any help appreciated.

I recently had the oil, 2 front tires, air filter, spark plugs, serpentine belt, and ac belt changed in the same day. Was told from all stuff changed,to only go back after 2 weeks to readjust the ac belt to remove the noise it was causing. I went back 1 week due to loud noise when turning on the car & driving got worse. On my way to the mechanic, my car overheated really bad. got stuck on the street and I checked it. the ac belt was in pieces, the radiator cap still on but the top plastic of the radiator had a small hole now; when I tried to squeeze the large radiator hose for leaks water squirted out from the place the hose touched the radiator. The little hose attached next to the radiator car was off completely and water was all over the place. Was told the obvious,"your car overheated and needs to have the top of radiator replaced for 48.00 bucks and a new ac belt 15.00." They kept my car for 4 days to diagnose the overheating. They changed one of the spark plug wires due to it was old; they said it ripped when they tried to take it off. They put new head gaskets due to the overheat they said. Before it stopped on me, all the lights went off, battery, seat belts door open and engine light. They cleared all the lights except the check engine light stays on. I got my car back and was told the knock sensor needs to be replaced. I need to know if the engine light staying on and the knock sensor having to be replaced was caused from the overheating of the car and my car doesn't have much strength/power anymore. Has a hard time trying to speed up even under 30 miles an hour; worse at higher miles per hour. hard to get on the freeway due to my car doesn't speed up fast enough to go the same speed as people on the freeway. I noticed the rpm at one time stayed above 600 even though I was releasing then pressing the gas pedal. At other times, it goes up to over 400 driving at 35 miles an hour then suddenly drops to the average for my car before all this happened between 200 and 300. What can anyone suggest I do. I am not a mechanic, but I don't want to be ripped off when I go to another one. My check engine light is on, the knock sensor needs to be replaced was what I was last told and now my car loses power. things I didn't have issues with before I took it to that mechanic.

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I'm afraid you have been touched badly
the best advice when something happens is to have the fault codes read first and only fix what was wrong
The lack of power can be from incorrect valve timing done when the head gaskets were replaced
radiators do crack and fail and give no indication other than a water leak or water consumption or a higher than normal water temperature
I would seek the services of an accredited service shop with experience on your vehicle and if it turns out to be the case I would seek action to recover costs from the mechanic as the work was defective.

Posted on Apr 15, 2015

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Code p0325


P0325 Knock Sensor 1 Circuit Malfunction
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.
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

Nov 20, 2016 | Cars & Trucks

1 Answer

What causes a 1989 nissan pickup ping or knock?


Pinging or detonation is caused by the spontaneous combustion in the chamber from incorrect air/fuel ratio and timing. It is most prevalent in lean mixtures under load. Run the fault codes and check for faulty HO2s and O2 sensors as they tell the ECM what mixture and timing is required to stop it

Apr 25, 2014 | Nissan Pickup Cars & Trucks

1 Answer

Hello, I need some help. I have a 1996 Honda Civic ex (automatic) D16y8 VTEC engine. Today I had a mechanic replace distributor with a new one (not rebuilt) from an auto parts store. The mechanic did not...


Yes, the ignition timing could be off enough to cause the symptoms and the check engine light.
I would take it back to the shop and tell them to set base timing, clear the code, and refund you the cost of the knock sensor and labor.

Jul 07, 2013 | Cars & Trucks

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

2 Answers

GMC 4.3L DTC P0330 flashing MIL


P0330 - Knock Sensor 2 Circuit Malfunction (Bank 2)
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 P0330 code may show up intermittently or the Service Engine light may be lit constantly. Other knock sensor related DTC codes include P0325.

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

Causes: A code P0330 most likely means one or more of the following has happened:
The "B" 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 on bank 2 (compare it to factory specs)
Check for broken/frayed wires leading to the sensor
Replace the knock sensor on bank 2


Hope helps.

Aug 23, 2011 | GMC Safari Cars & Trucks

1 Answer

I have a code p0325 knock sensor 1, circuit bank 1 or single sensor problem


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.

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


Test it and tell us news.

Mar 15, 2011 | 1999 Nissan Maxima

1 Answer

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

Mar 02, 2011 | Honda Pilot Cars & Trucks

4 Answers

Nissan xterra knock sensor


It's the valley of the engine underneath the intake manifold. It's about an $800 job because the top of the engine has to come off. However, unless you have a supercharged xterra it shouldn't effect performance. Also, the knock sensor will not trip the check engine light, as it does not indicate a primary problem, so if your light is on you should have another code that should be fixed first.

Nov 05, 2008 | 2002 Nissan Xterra

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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