Camshaft position sensor replacement

  • 4 CYL
  • 150,000 MILES
So I am attempting to change both sensors on my car. I was easily able to do the one nearest the back of the engine but I can’t reach the bolt for the front one (bank 1 I believe). I don’t have a lot of car/auto knowledge so I’ve been looking all over the internet trying to see what I can do. Any suggestions/help would be appreciated!
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Friday, December 25th, 2020 AT 11:22 PM

1 Reply

Before fighting to change it might I ask why they are being changed? What are the codes you have or symptoms that are causing you to change them. They rarely fail, the wiring and connections are usually the problem and simply testing those can tell you if the sensor is bad before you replace it. Also some codes will tell you if the sensor is bad simply by the code itself, For instance say the code is for cam crank correlation problems. That wouldn't be a bad sensor as it is telling you the sensor is working by setting that code. Now if it's a camshaft sensor circuit code, then it could be any of the wires or the sensor itself. Testing them isn't that hard though and then if you needed to you could replace it. In this case there are three wires to each sensor. Power is the Orange wire at each sensor, they share that feed from the same fuse but then two separate wires from there. To test that a simple cheap test light will work. You would connect the light to a ground connection and turn the ignition key on, then verify that the Orange wire has power to the connector on both sensors. The light will come on if they have power. Next are the grounds, these use different colors for the two sensors, Sensor one uses a green wire while Sensor 2 uses a White wire with a black stripe. Testing however is the same for both. Connect the test lights clip to a power point like the battery positive post, then with the key on touch the tip to the connector for the Green wire and the White w/black wires in turn. The light should light if the grounds are good. To test the signal output is a bit harder as the sensors are both simple on/off switches that read the small teeth on the reluctor gears attached to the camshaft. Testing them with a test light isn't really possible however you might find the problem is in the power or ground which is the most common issue.

Now as to how to get to the bolt, it depends on what you have for tools, normally a short universal socket will help on bolts that are in a tight spot. They are pictured in the last image. You can usually find reasonable priced ones at parts stores or even at places like Lowes and Home Depot. With those you can usually get onto the harder locations because you can move the tool around to clear other parts.
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Saturday, December 26th, 2020 AT 12:36 AM

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