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San Antonio, TX
I do alot of stop light switches for this concern,check to see if your brake lights operate.if not check for power into the switch,then press the brake and check for power out of the switch.
more than likely your vehicle is a flex fuel model.under the driver's side of the dash is a flex fuel module that is very notorious for this exact concern.it is about 2 inch square black plastic with a small metal bracket that bolts to the center dash frame.
New high voltage battery assembly is 10,000 dollars.I do not know of a rebuilt unit availability.
could be as simple as an engine compartment battery,or as complex as an abs module.you need to take it to a dealer to retrieve the trouble codes stored in the system.we need these codes to begin our diagnostic process,otherwise we would just be guessing.
the wrench light indicates a concern with the powertrain,engine or trans. there should be a trouble code stored in one or more modules.you will need to take it to a dealer and have it scanned to see what it needs.
last time I checked it was 10,000 dollars retail plus about 300.00 dollars labor.
It sounds similar to an exhaust restriction.put a vacuum gauge on a vacuum line and rap the throttle while in park.the vacuum should snap back to what it was at idle.if it moves slowly to the reading at idle you have a restriction.also the baro pid is a telltale sign(if you have a scan tool available)anything in the 149hz and below is also an indicator.or if you have access to a backpressure gauge,should not read above 3psi.good luck!
check for vacuum leaks,mainly the pcv tube behind the throttle body.very common!
usually at about 60-70,000 miles the spark plugs start breaking down and is a good time to change them before you destroy your catalytic converters with a misfiring engine.
when the voltage to the cluster drops below a preset point,it will prove out.sounds like a battery that is weak.