Error code P1336 2002 merc. mountaineer

[joking103]

Hello,

I have read a lot of post on relearn for this code, but... If none of these parts listed in these emails have been moved or replaced. Why else would I get this code? Do we do a relearn on it anyways?

[shorod]

Welcome to the forum!

The code P1336 is for a Crankshaft (CKP) and/or Camshaft (CMP) position sensor input signal to PCM concert. It is triggered if the input signal to the PCM for either of these sensors is erratic. Per the factory service manual, this can be due to:
- a damaged PCM
- damaged CKP sensor
- damaged CMP sensor
- base engine
- harness concerns.

The service manual suggests checking the following items:
- harness routings,
- alterations,
- improper shielding,
- or electrical interference from other improperly functioning systems.

To properly check the operation of the CMP and CKP, you'll really need an oscilloscope. The code is probably being triggered due to a faulty sensor or connection and not something that just needs to be reset.

-Rod

[joking103]

Thanks for the kind welcome, and quick response!


If I could pick your brain a bit more, can you tell me where these sensors are located (in engine/exterior)? Which leads to my next question is it a big job to change them?

If you can get to them, how can you determine whether the sensor is bad or not(visible)? It all boils down to not spending an arm and a leg at the garage if you can do the job yourself? Thanks again for your help. Jo

[shorod]

Both sensors will be attached to the engine. Which engine does your Mountaineer have, the V8 or a V6?

You likely won't be able to tell if a sensor is bad just by looking at it, unless the connection is loose/corroded/broken. To test the sensor, you will need a high end scan tool or an oscilloscope.

If you would like a copy of the procedure to change these sensors in PDF format, send me a private message with an e-mail address for you than can accept attachments along with which engine your Mountaineer has.

-Rod

[joking103]

some car expert my husband is talking with said because the car seams to be running only on 7 cylinders. It is not those sensors because the car would not run at all if it were... What do you think of that?

[shorod]

If the CMP sensor were not working at all, the car would still run but should set a trouble code. The PCM would use the CKP sensor as a reference. If the CKP sensor were faulty, chances are pretty good the car would not start.

However, the code just indicates that there is a concern with the CKP or CMP sensor, it does not indicate that there is no signal from either of the sensors. One of the signals could be intermittant and cause rough running, but not be failing 100% of the time (which is why I suggested you'd need an oscilloscope to check the sensors out).

-Rod

[joking103]

Ah I see I will pass that along. Just so you know my husband and I have been very appreciative of your responses. Thanks!

How is it that you know so much about this stuff?

[shorod]

Originally Posted by joking103

Ah I see I will pass that along. Just so you know my husband and I have been very appreciative of your responses. Thanks!

How is it that you know so much about this stuff?

I make it all up as I go along.....

Just kidding, all joking (no pun on your username intended) aside, I spent most of my childhood around cars. My parents opened an auto repair shop when I was in preschool. Mom would pick me up from half day preschool and I'd spend the rest of the afternoon shadowing Dad until closing time. I'd spend many weekends down there as well, sweeping floors and taking inventory as I grew older. At 14, I had enough credits in high school to get out early, so I'd hop on my bicycle and ride to the shop to help Dad in the afternoons. I worked there full time during the summer, until halfway through my college career when Dad told me I needed to find a job more in line with my degree (electrical engineering).

I've maintained an interest in cars ever since. Ford and Delphi never called me back when I gave them my resume, so I went into the government electronics sector and work on cars as a hobby. The salary of a Systems Engineer allows me to buy enough tools and toys to be dangerous, so I usually focus my "fun" money in bicycles, tools, and electronic automotive diagnostic equipment. I follow these forums during my lunch break and in the evenings to increase my knowledge and help out when I can.

-Rod