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The knock sensor on a 2003 Honda CRV is located on the engine block. Specifically, it is located under the intake manifold, which means it can be difficult to access. Here are the steps to locate and replace the knock sensor on a 2003 Honda CRV:
Disconnect the negative battery cable to prevent electrical shock.
Remove the intake manifold. This involves removing several bolts and electrical connections.
Locate the knock sensor, which is located near the rear of the engine block, under the intake manifold.
Disconnect the electrical connector from the sensor.
Remove the sensor from the engine block. This may require a special tool, depending on the specific design of the sensor.
Install the new knock sensor, making sure it is properly aligned and tightened to the correct torque specification.
Reconnect the electrical connector to the sensor.
Reinstall the intake manifold, making sure all bolts and electrical connections are properly secured.
Reconnect the negative battery cable.
Note that if you are not experienced with working on engines or are unsure of how to proceed, it may be best to seek the assistance of a qualified mechanic to replace the knock sensor on your 2003 Honda CRV.
The knock sensor detects internal engine knock and retards timing accordingly . If a code is set for it, replace it and make sure the harness connector is in good shape, always a good idea to replace the pigtail end when doing the sensor cause sometimes its hard to tell
Install the knock sensor.Tighten Tighten the knock sensor to 25 [n-m] (18 lb ft).
Connect the knock sensor electrical connector.
Reinstall the intake manifold. this is quite a job and i would not reccomend a novice mechanic to preform this repair book time is about two hours for this repair hope this helps
It is not a bad knock sensor necessarily, no code indicates a part is defective just that a problem exists in that circuit, this is where do it yourselfers get into problems. Have it properly diagnosed by the book on special equipment.
CARB (California Air Resources Board)
has a consistent policy regarding monitoring knock (Ks) sensors but
vehicle manufacturers don't have a consistent way of using knock sensor
circuitry. There are generally two methods that manufacturers have for
using the knock sensor.
In the first design, which is found in most vehicles, the knock sensor
plays an active role in controlling ignition timing. In this system, the
PCM is advancing ignition timing until knock occurs and then retards
timing slightly. This system runs on the verge of engine knock at all
times. In this system the function of the knock sensor circuit is critical. If the sensor malfunctioned, precise ignition timing control could not be achieved.
A "dead" sensor circuit would not be able to detect actual knock, timing
would be overly advanced, and NOX exhaust emissions would increase. For
this reason, manufacturers that use the knock sensor in this manner are
required to monitor this sensor and light the MIL light when a
malfunction is detected.
In the second design, the knock sensor plays a very passive role and is
really only on the engine for protection purposes. The various engine
sensors send their information to the PCM to determine ignition timing.
The PCM uses this information to control the ignition timing based on
look-up tables stored in its memory. If ignition knock is detected, the
PCM will take action and ****** the timing a few degrees. This type of
control is generally used to control spark knock caused by changes in
fuel octane.
Used in this way, the knock sensor is less critical to emissions and may
not even have a measurable emission impact. Unlike the first design, a
"dead" knock sensor in this system will have little to no effect on the
operation of the engine. Manufacturers that use this design are not
required to monitor the sensor under EPA OBDII regulations and will not
turn on the MIL if the P0325 DTC is set. Remember, this sensor does not change the operation of the engine. The
customer will not notice any change in the way the vehicle operates. The
knock sensor system has a one trip detection logic and WILL NOT turn on the MIL or store Freeze Frame data. How to Diagnose P0325 Most technicians know how this type of sensor operates. Its element
produces a voltage when the sensor picks up a vibration, usually caused
by engine detonation.Technicians then check the ohmic value of the sensor. Maybe this was of some help.Your valuable feedback would be appreciated.Thanks for choosing Fixya.
Turn ignition off. Disconnect knock sensor 3 - pin harness connector. Locate knock sensor, on cyli nder block. On Optima 2.7L engine, sensors are located on both sides of cylinder block. . Remove knock sensor from cylinder block. To install, reverse rem oval procedure.
I don't know where the knock sensor is exactly on this engine, but if you buy the replacement first it will help you identify it.
It's screwed into the block near the head or the head itself. It has an electrical connector attached to it (two wires, I believe).
The replacement is pretty simple: remove the electrical connector from the old one; screw it out with a wrench; screw the new one in and; plug the connector onto it.
BEFORE YOU GO AND SPEND THE MONEY AN A KNOCK SENSOR I WOULD GO AND GET A FUEL PRESSURE TEST. IF YOU ARE LUCKY IT MAY BE STARVING FOR FUEL AND COULD BE AS SIMPLE AS A FUEL FILTER
Knock Sensor Description
addthis_pub = 'car-suff';
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To All,
Does anyone know on a 2003 Jaguar X type where exactly the knock sensor is located?
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