ESS failure... at 50 MPH?

[NavyVet1959]

So it turns out this is not an ESS issue at all, though it does seem to trigger the ESS warning. The problem is the crank position sensor itself. My Jeep is sitting in the shop now waiting for a new sensor (on backorder), so I probably won't have it back until next week. This is disappointing for a vehicle I have only been driving for about 3 weeks.

You might want to point the dealer in that direction. Earlier in this thread, I linked to another post where this was happening to a Jeep Cherokee driver as well.

If your Jeep threw a CEL, they should have some place to start. It stores the code even if the CEL goes away.

I especially hate it when the kiddie engineers put these monitoring systems in the vehicles and it's not the thing that they are monitoring that causes the vehicle to be disabled, but rather just a failure in the sensor itself that makes it appear that there is a problem. And then instead of being a cheap repair to just replace the sensor, it has been molded into the unit it is monitoring, so in order to "fix" the problem, you have to replace the entire system. Dodge did that with the sensor on the brake fluid reservoir on my pickup. At that time, the only fix was to replace the reservoir which cost over $100 whereas if the sensor itself had been available, it would have been less than $10. So, my solution? Wire a resistor across the plug that connected to the reservoir sensor so trick the vehicle's computer into thinking that the sensor was operating correctly. On my wife's 335d, if the sensor on the DEF tank goes out, you have to replace the whole tank for a cost of around $4K at a dealership from what I've gathered.

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[old8tora]

On my wife's 335d, if the sensor on the DEF tank goes out, you have to replace the whole tank for a cost of around $4K at a dealership from what I've gathered.

Whatever you do , do NOT attack the sensor on the DEF tank with a screwdriver just to see what happens ; they will void your warranty and then charge you $4K .

 

[Jeepy Jeepy]

So it turns out this is not an ESS issue at all, though it does seem to trigger the ESS warning. The problem is the crank position sensor itself. My Jeep is sitting in the shop now waiting for a new sensor (on backorder), so I probably won't have it back until next week. This is disappointing for a vehicle I have only been driving for about 3 weeks.

You might want to point the dealer in that direction. Earlier in this thread, I linked to another post where this was happening to a Jeep Cherokee driver as well.

If your Jeep threw a CEL, they should have some place to start. It stores the code even if the CEL goes away.

Apparently they had to replace the solenoid... lets hope that helps but i'll let them know of that as well.

 

[Salts101]

Do you have a BSG system? Belt driven starter/generator? Mine locked up solid and not only killed my engine, but I think it caused the catastrophic failure that destroyed my engine.

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