Crankshaft Position Sensor on the Jeeps (4.0 & 2.5) reads a set of slots that is spinning on the flywheel. These slots cause the CKPS to send a pulse to the Power Control Module (ignition computer/brain box) indicating engine speed. Also the PKCM uses this pulse signal to set ignition timing and supplying the tachometer with the RPM that you see in the dash. Crankshaft Position Sensor "How to"Where is the sensor located? Sensor is located on the driver’s side of the engine, back of the block where the transmission joins the block. Bolted to the transmission bell housing with 2 bolts and has a long wiring harness/plug coming up by the fuel rails. Will it trigger the check engine light if the sensor is faulty? Yes it will trigger the “check engine” light. But most of the time when the Crankshaft sensor goes the engine is dead as a hammer. It will turn over but will not fire at all. Occasionally a CPS will cool down long enough to fire up again. Then you get you down the road a little bit and it leaves you stranded again when it gets hot and decides to quit. Why does it fail? Heat is the biggest issue for this sensor going bad. How do you test a Crankshaft Position sensor to see if it’s bad? You just need a Multi-meter for this test. Set your meter to measure ohms (Ω) using the scale between 1K-10K. Place your leads across posts B & C of the CPS plug. You should get a reading of open or no resistance. If you get a reading of low resistance, replace the sensor. On all 2.5L & 4.0L engines (except YJ models that come with the 4.0/automatic combination) there are 2 bolts and the plug to deal with. Unplug the harness. Just take out those 2 bolts and pull the sensor out of the bell housing. For the 2.5L/automatic the sensor is help in place with 2 nuts instead of bolts. The YJ Wranglers that come with the 4.0/automatic, the sensor uses a single slotted hole to adjust the mounting depth. When purchasing a new sensor for the 4.0/auto YJ there will be paper spacer attached to the end of the sensor that gets inserted into the bell-housing. This spacer sets the correct depth to be installed. Simply drop the sensor in until the paper spacer bottoms out in the hole, then tighten the bolt. When the engine turns over it rips the paper off the sensor, don't worry .. it's not gonna hurt anything having that tiny paper shard in there. As for the all the others that do not use the paper spacer, simply drop it in until the sensor body is flush to the bell housing, tighten the bolt and you are done. Replacing the sensor in Wranglers isn’t too bad. Cherokees are a bit more troublesome to access. My Wrangler I can get it from the bottom or top. Cherokees because of having more goodies in the way, they tend to be a bit easier to get from the bottom. Use an extension or two and reach over the bell housing of the transmission to reach the bolts. A quick note about the different crank shaft sensors, there were 2 styles. One has the round plug which was typically the 1991 & 1992 models. The other style has a flat plug which was the 1993 and up models. But, AMC/Jeep was known for "cross-over"
parts. The images below will take you to Amazon where you can see close ups of the two plug styles to ensure you get the correct one. INSTALLATION NOTE: When you go to re-install the CKPS don’t get the bright idea of putting a bolt through the sensor and then drop the sensor into the hole it goes in. Why you ask? Simple .. it would be way too easy for that little bolt to be dropped and fall right into the little hole where the Crankshaft Position Sensor goes. If that
happens you will have to pull the transmission back to get the bolts out, NOT FUN! Put the CKPS into the hole first, fully seating it into place. THEN put the bolts in. The hole is now plugged so nothing can fall in. Video of Crankshaft Position Sensor Joined
Oct 17, 2012 · 264 Posts
Discussion Starter · #1 ·
May 10, 2016 Anyone know where the crankshaft sensor is located in a 2012 jk? I see a few things that might be it underneath the engine. I got a check engine light saying sensor. Joined Oct 17, 2012 · 264 Posts
Discussion Starter · #2 ·
May 12, 2016 Wow. I guess no ones had crank sensor issues??? Joined
Jun 24, 2015 · 2,476 Posts
Anyone know where the crankshaft sensor is located in a 2012 jk? I see a few things that might be it underneath the engine. I got a check engine light saying sensor. Should be #4: Joined Oct 17, 2012 · 264 Posts
Discussion Starter · #4 · May 13, 2016 Should be #4:
I can't tel where on the engine that is located Joined Jun 24, 2015 · 2,476 Posts
I can't tel where on the engine that is located It should be located to the right of the main crank pulley. Joined Oct 17, 2012 · 264 Posts
Discussion Starter · #6 · May 13, 2016 It should be located to the right of the main crank pulley. There are two sensors that look just like the picture. Are you talking about the one just behind the flywheel on the right side? Because there is another sensor identical to the crank sensor that is on the right but more towards the rear. Joined Jun 24, 2015 · 2,476 Posts
There are two sensors that look just like the picture. Are you talking about the one just behind the flywheel on the right side? Because there is another sensor identical to the crank sensor that is on the right but more towards the rear. Sensor should look like this:
 Joined Oct 17, 2012 · 264 Posts
Discussion Starter · #8 · May 13, 2016 Sensor should look like this:
Lol. I see two that look like that. Joined Dec 20, 2008 · 8,974 Posts
The "crankshaft" sensor is mounted on the passenger side of the engine back near the bell housing. Joined Oct 17, 2012 · 264 Posts
Discussion Starter · #10 · May 13, 2016 The "crankshaft" sensor is mounted on the passenger side of the engine back near the bell housing. Ah so it's on the rear of the engine as compared to most engines it's in the front near the pully?
Joined Dec 20, 2008 · 8,974 Posts
Joined Oct 17, 2012 · 264 Posts Joined Jun 24, 2015 · 2,476 Posts Joined Jun 24, 2015 · 2,476 Posts
Ah so it's on the rear of the engine as compared to most engines it's in the front near the pully? I'm getting conflicting information on this when trying to get your question answered. I know a few techs and ran this by them. It seems that they are confusing the camshaft and crankshaft sensor. What I
was last told, is that you can contact your dealer with your VIN and they can lookup the part and it's exact location. I really wish I could be of further assistance. Please post back and let us know how you make out. Joined Oct 17, 2012 · 264 Posts
Discussion Starter · #15 · May 13, 2016 I'm getting conflicting information on this when trying to get your question answered. I know a few techs and ran this by them. It seems that they are confusing the camshaft and crankshaft sensor. What I was last told, is that you can contact your dealer with your VIN and they can lookup the part and it's exact location. I really wish I could be of further assistance. Please post back and let us know how you make out. Thanks. Maybe I will try this tomorrow. Joined Dec 20, 2008 · 8,974 Posts
That's camshaft. I said crankshaft I'm attempting to assist you. Here is where the "crankshaft position sensor" is located. There's also a "camshaft position sensor". Now we both know where each one is located. It seems like the two terms are used interchangeably by us and techs at times as stated by dave.
Sensors, Engine 4 is crank, 12 is cam. The sensor in the front is "camshaft". Joined Dec 20, 2008 · 8,974 Posts
Correct sensor. Confusing terminology. Joined Oct 17, 2012 · 264 Posts
Discussion Starter · #18 · May 13, 2016 Again it's crankshaft sensor not camshaft sensor. I know where the two camshaft sensors are located. I'm tryouts no to find the camshaft sensor. When I leave k under the engine on the passenger side there are multiple sensors that it could be. But it is only one of them. And they all look similar.
Joined Dec 20, 2008 · 8,974 Posts
Again it's crankshaft sensor not camshaft sensor. I know where the two camshaft sensors are located. I'm tryouts no to find the camshaft sensor. When I leave k under the engine on the passenger side there are multiple sensors that it could be. But it is only one of them. And they all look similar. I understand
what you're saying , but I don't know what to tell you. The #4 location is the "Crankshaft Sensor" as indicated in the parts schematic and listed at $13.99. There is one Crankshaft Sensor. The Camshaft Sensor(S) is at the #12 location in the diagram at $39.88 each. There are two Camshaft Sensors listed as required for replacement. The diagram only indicates the #12 location. At this point I'm unable to be more specific as to location other than what's listed in the schematic. The #4 location for
the Crankshaft Sensor should be self explanatory since there's only one. If you need further assistance maybe the dealer can better help you. Good luck. Joined Jun 24, 2015 · 2,476 Posts
There are two sensors that look just like the picture. Are you talking about the one just behind the flywheel on the right side? Because there is another sensor identical to the crank sensor that is on the right but more towards the rear. Doing a bit more research, I'm led to believe that the crankshaft
position sensor is at the rear of the engine. It should be the sensor near the bell housing and flywheel. |
2010 jeep wrangler crankshaft position sensor location
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