Crankshaft position sensor relearn?

Hi guys, new to the forum. I have a 08 4.0 v6, 1gr-fe engine. It was giving me a p0335 code for the crankshaft position sensor. I changed it out but it still gives me the code. Does anyone know if the 2nd gens have to relearn after changing out the sensor?

 

Nope, not with Toyota.

You may have a wiring issue.

 

You can verify the wiring somewhat with a multimeter but you need an oscilloscope to properly diagnose a cam or crank sensor problem.

 

Thats unfortunate, I don't know the first thing about wiring.

 

What is an oscilloscope and where can I get one?

 

All feedback is greatly appreciated, thanks guys.

 

Not sure about the taco, at work when I get the code for crank or cam sensor, I replace both and that engine has a short harness I also replace. Never fails, replace one sensor, the other one fails, or the harness is bad.

 

Not sure about Toyota, but on some cars a crank/cam sensor error can be caused by bad timing such as bad/broken/stretched timing chain/belt or poorly operating vvt (bad enough to throw the timing off but not bad enough to throw a code itself), but if it's that it usually runs really bad or not start at all.

 

If you are asking this question, you probably need to take it to a shop that has the ability to troubleshoot this issue.

https://www.tek.com/blog/what-is-an-oscilloscope

 

The first time I ever seen a scope was in this video.
When it was all said and done, I found it very interesting.
And at the same time, gained a lot of respect for todays Technicians.
It take a small fortune just to start working on vehicles now days.

BTW, I watched the wholes series, not just this one video.

https://youtu.be/75ptVbCpkjk

 

It’s been years since I even heard oscilloscope mention. I think it was used for fine tuning back when you loosen and twist the distributor to set timing, gap the points and such.

 

It's a very common tool these days for intermediate to advanced technicians to use although it's more commonly referred to as a lab scope or automotive scope and you need a multi-channel one to do many tests.
It's pretty much a required tool to diagnose many issues on modern vehicles unfortunately many shops, dealerships, and individuals still use the old "read a code, change a part" approach which while it works sometimes it can get quite expensive when it doesn't.
The hard part is finding a shop that has the proper test equipment and techs with the knowledge to use it.
https://www.youtube.com/watch?v=qSr6k3htjKY

 

ScannerDanner has used cheap, handheld scopes in some of his videos. A Sainsmart handheld can be had for as little as $99 to about $150 for a 2 or 4 channel. No, it's not the greatest scope, has a somewhat limited bandwidth (but by and large enough for automotive use), and being handheld doesn't have much resolution, but it CAN do quite a bit when it comes to auto diagnostics since a scope is just a graph of voltage versus time. For example, it easily has enough power/resolution to see if an injector is operating correctly (I believe that's one of the things SD used it for).

It's a cheap way of performing at least some testing and to wet one's feet on the use of a scope for automotive use. One disadvantage is being just a general pocket scope, it doesn't have any preset tests the way a dedicated automotive scopes (read much more expensive) have.

 

Neither has anyone else...

 

I have an old 2007 Buick Rainier (the Buick version of the Trailblazer). When the crankshaft sensor is replaced (on the 4.2L at least), a relearn procedure has to be performed. For GM it's called a C.A.S.E. relearn (for Cranshaft Angle SEnsor). I hate GM. At the time we just got it 4 snow days. Right now it's in the far end of the driveway because I have to replace the PS pressure hose (for the second time) - if you google it, it's a REAL PIA process.

 

I believe Jimmyh was referring to hearing about a sensor relearn on a second Gen.
Never heard of it, because you can’t and don’t need to.

And yeah, I’ve heard of the CASE. There’s no need in all this fancy relearn junk IMO.
I believe you have to register the battery in some BWM cars now? WTF….really?

 

My two cents.

Just took my truck in with this CEL/code. Nothing wrong with the sensor. Turns out a rat had chewed the wiring.

So check the wiring harnesses for damage.