Code:PO504
#1
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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
#2
#4
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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.
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