Code:PO504

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October 26th, 2014, 7:08 PM

Dennis-Pa

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Code:PO504

we have a 2007 Express, DRW, 12,000 lb. bus. It has a PO504 code/Brake Switch circuit 1-2 correlation(symptom 00) The modis gave me the code,but in the troubleshooting program there was no PO504 code listed.Would anyone know what to look for to fix the code. thanks dennis

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October 26th, 2014, 7:23 PM

canucklehead

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P0504 Brake Switch A/B Correlation DTC

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October 26th, 2014, 7:46 PM

Dennis-Pa

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thanks canucklehead.I just bookmarked that website,not sure why the modis didn't have any info listed for that code,might need updated again.

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October 26th, 2014, 10:24 PM

tech2

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I do not see that code listed for a 2007 express van. Is your modis software up to date for a 2007 model year? If you enter an older year into the scan tool you can get codes that do not apply.