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Electronicals / Forscan Expert
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The PID you need to look for is Brake Pressure Switch (BPS).
Here is a thought. If you have cruise control, disconnect the servo connector. The brake pedal position switch "signal" comes out of the switch and splits to the cruise control module/servo and also to the PCM. Something could be going on with the CC and is bringing the voltage down or something along those lines.
I'm wondering if the code setting criteria is checking a correlation between the brake pedal position switch and the brake pressure switch. If the two values don't match it sets a code based on the one that doesn't. Either that or it is seeing a voltage that is neither battery voltage or whatever the non-brake applied voltage is.
If you want a half-A$$ed fix, you can just jump your brake pedal position switch over to the pressure switch wires and disconnect the pressure switch. It's there for redundancy for Cruise Control deactivation. When I added all the power options to my truck around 2010, I never installed the pressure switch and just jumped the wires. Granted this is only on a RWABS system, so I cannot vouch for ill side effects on a 4WABS system.
Last edited on Wed Apr 25th, 2018 01:08 am by sheltonfilms
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2000 XLT 2.5L A/T 2WD
Mods:
Power Windows/Locks Mirrors using OEM harness and parts
Explorer Sportrac White Face Cluster
Explorer OHC and Auto-dim Mirror
Auto Door Locks
Full HID Projector Retrofit