Question about 1991 Toyota Pickup

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Check engine light tells me knock sensor or circut or ecu.

Where is the sensor located?

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On a v-6, the knock sensor is located under the intake manifold assembly, on the inner edge of the cylinder block.

Posted on Dec 08, 2008

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Where is the location of the engine data sensor on a 1994 ford escort hatchback lx


Which sensor? There are several 'engine data' sensors. What particular data is it?

Cam position
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Coolant temerature
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Knock sensor
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Where is the ECU located on a 1992 ford explorer and what does it do?


What your Explorer has is actually called the EEC-IV. It is sort of like an ECU. The EEC stands for "Electronic Engine Controls". Your EEC-IV Does this:
  • Powertrain Control Module (PCM)
  • Throttle Position (TP) sensor
  • Mass Air Flow (MAF) sensor
  • Intake Air Temperature (IAT) sensor
  • Idle Air Control (IAC) valve
  • Engine Coolant Temperature (ECT) sensor
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The EEC microcomputer circuit processes the input signals and produces output control signals to the fuel injectors to regulate fuel discharged to the injectors. It also adjusts ignition spark timing to provide the best balance between driveability and economy, and controls the IAC valve to maintain the proper idle speed.
The EEC is located in the engine compartment. Post your engine size and I can tell you where it's at.

Jul 22, 2013 | Cars & Trucks

1 Answer

What is ECU


The knock sensor is commonly located on the engine block and essentially listens for improper combustion when the engine is running. Engine knock, or spark knock, is the noise created when the combustion process is erratic or abnormal. Code p0330 indicates that the knock sensor has picked up a frequency outside of the factory-set frequency range for the combustion chamber. The computer uses information from the knock sensor to adjust the engine ignition timing to keep combustion within the safe zone of operation. In general, when the knock sensor code is set, the computer will put the engine into limp mode to help prevent engine damage.


ECU= Engine Control Unit [The Cars Computer]

Dec 19, 2012 | 2002 Toyota Sienna

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Service engine light on. Problem identified as P0332 Knock Sensor 2 Circut Low Input Bank 2


P0332 GM

Knock sensor circuit low voltage bank 2
- The ECM detects a KS signal voltage that is less than typical engine noise level for at least 4 seconds

Probable Cause[s]

  1. Open or short circuit condition
  2. Poor electrical connection
  3. Knock sensor
  4. ECM fault

Mar 13, 2011 | 2003 Chevrolet TrailBlazer

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Location of knock senor on 97 maxima se


Your knock sensor is located Under the hood, center, front engine area, below intake manifold, mounted on block.


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.

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.

May 15, 2009 | 1997 Nissan Maxima

1 Answer

My check engine light is on on my 98 nissan 200sx


the knock sensor tells the car's on board computer/PCM that the engine is pinging/knocking from poor fuel or the wrong octane or other engine related faults, they seldom fail, most likely the connector to the sensor is making a poor connection, the knock sensor is located on the engine block, it screws into th water jacket, do u hear any engine ping or spark knock?.

Dec 21, 2008 | 1998 Nissan 200SX

1 Answer

Check engine light tells me knock sensor or circut ecu


On a 6 cylinder, the knock sensor is located under the intake manifold, on the inside edge of the cylinder block. You must remove the entire intake manifold assembly to access the knock sensor. If you are replacing it, it would be very advisable to replace the sensor AND the extension wire from it to the main harness. I have observed that the wire extensions become brittle over time, and they fail with regularity.

Dec 07, 2008 | 1991 Toyota Pickup

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

1 Answer

Body ECU


The problem is not 100% solved. I have figured out that the problem is in the ground circut for the "Body ECU" system. The only circut effectfed is the door, ignition switch ilumination. If a ground is forced to the circut it works oK.
What I need is a diagram of the internal workings of the "body ECU". I have not yet removed it but it can be much more than a bunch of relays. By the way tell the guy with SD22 Nissan to search SD22. The sole distributor for that product is located in SanFran.

Jul 05, 2008 | 2003 Toyota 4Runner

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