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James, Ford Technician
Category: Ford
Satisfied Customers: 3632
Experience:  Ford Senior Master Tech, Ford gas and diesel expert, ASE Certified
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I have a 2008 powerstroke with a code 0546 clear codes start

Customer Question

I have a 2008 powerstroke with a code 0546 clear codes start truck and it comes right back
JA: Will the headlights turn on? Is the battery fully charged?
Customer: yes
JA: What is the model of your '08 Ford?
Customer: f250 superduty
JA: Are you fixing your F250 yourself? What have you tried so far?
Customer: cleaned exhaust filter and replaced all 3 sensors and pressuer sensor the truck had no turbo boost to start with
JA: Anything else you want the mechanic to know before I connect you?
Customer: truck runs good now and builds turbo boost now
Submitted: 11 months ago.
Category: Ford
Expert:  James replied 11 months ago.

Hello, please give me a moment to look up this code.

Expert:  James replied 11 months ago.

Hello, There are 4 sensors if you count the EGRT on the Y pipe. It sounds like you have a wiring concern. Usually the wire will break off inside the connector. I would unplug EGT 1 in the exhaust and tug on each wire. Usually the wire will pull out if it is broken. You can purchase replacement pigtails from Ford to correct this concern. That is what I have seen happen with this code and the sensor didn't correct the issue.