Short story is the teenage boy was driving the 95 850 Turbo today and the check engine light came on. WHen he got it home, I took a look at it. Rather than pull the codes from the engine bay, I decided to hook up the pocket scanner I have to the OBDII port inside the car. The code that came up was code P0326. I cleared the code, and restarted the car. It popped the same code againabout 10 seconds after restarting Cleared itone more time and it popped the code again, so it is a true failure. Car idles fine and seems to run ok on the road. The fuel tank was about 1/4 full so I don't know if that had anything to do with it.

I read where the code calls out a bad front knock sensor signal. Now for the question. What do I need to do to troubleshoot it, and where are the knock sensors located?

If anyone has had this problem and fixed it, please chime in. In other words.....Help!!

Thanks,

Glenn

 

Hi Glenn,

Please see attached pics. It seems that you would need a multimeter but mostly using the resistance (Ω) function. I would try cleaning the electrical connections to the sensor & inspect the wiring for grounding/damage before buying a new sensor. Tech would be able to give you better instructions I believe, so this may just be a reference.

Please let me know if you need more pages from the manual I have.

I hope the troubleshooting & repair go well for you & your son.


JPN

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The 2 knock sensors are located on the front of the engine. One like next to the vent box the other by the starter.
There is a bolt going through the center of the sensor.

See what type you have. There is 2 different types.
1.The sensors and harness are all one unit (Old style)
2.The sensors each have a plug going to them.(New style)

There was a Tech note many years ago about upgrading to the new style because there was a problem with the older style.

 

Thanks for the starting point guys. It doesn't sound like too much trouble to tear into and see what is up. I will get out and look at it as soon as it stops raining. It is pouring here right now and is supposed to keep doing so for the next two days..... I'll keep everyone posted.

Glenn

 

Well, I poked around in there a bit yesterday. I cleaned the connectors and checked the wires that come out of the ECM. Then for giggles I ran the scanner across it again and cleared the stored code. Reslut on start up....no code! GO figure. I hope it was just a dirty connection causing it all. My son tends to freak a bit when the check engine light comes on.

Anyway, all is good again, at least for now.

Glenn

 

!!!


JPN

 

I have the same problem. Since I know how to poke around and check connectors I'd like to try this first. But the only cars I worked on were a '67 VW bug and a 2CV. So I am not sure where to poke. Is the ECU and ECM the same thing? I am also trying to find the sensors but couldn't. How can I test them and how difficult is it to change them?

 

Yes ECU adn ECM are the same. The knock sensors are mounted in the front of the motor under the intake manifold.

 

So I took out the ECU, put it back and checked some connections. Didn't really clean anything but after clearing the code the check engine light didn't come back on. That is until I hit a pot hole. This time I just cleared the code and so far it didn't come back on. That leads me to believe that either there is a lose connection or the sensors are lose/going bad. Is there way to check if the sensors are good?