Question about 2003 Chevrolet Avalanche
Check engine light is on
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Posted on Jan 02, 2017
SOURCE: knock sensor circuit
I have 2001 Vanture, for last 5 days I am experiencing knocking problem, sometimes its too much and sometimes its very light,. but still there is knocking. can any body help me
and locate the knocking sensor position on the engine.
Posted on Nov 27, 2008
SOURCE: 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
Posted on Jan 13, 2009
HAS TWO KNOCK SENSORS they are both under intake in valley of engine. remove intake and will see two black grommets they are under those best to replace both at same time
Posted on Jan 26, 2009
They are located below the intake manifold, you may have to remove the intake to change them. The sensors may be shot, they have a problem with water puddling in their mounting wells, after changing, seal the sensors with an RTV to keep water out of the wells
The Knock Sensor (KS) system detects engine pre-detonation. The Powertrain Control Module (PCM) retards the spark timing based on the signals from the knock sensors. The knock sensors produce an AC voltage when specific frequencies are detected. The knock sensor voltages are an input to the PCM. The amount of AC voltage produced is proportional to the intensity of the knock.
When you ****** timing fuel mileage goes down.
Posted on Apr 08, 2009
SOURCE: KNOCK SENSOR KEEP GOING OUT
Make sure you are not over torquing it. if you screw it in to much, it will give false readings and if it is not screwed in enough, it will also give false readings.
There's a delicate balance to be known and, if this sensor is over torqued or, not torqued enough, it will malfunction.
Posted on May 24, 2009
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