DTC - 15
Engine coolant temp sensor error (low temp indicated)
DTC - 22
Throttle position sensor error (signal low)
DTC - 33
MAP sensor circuit error (signal high indicating low vacuum)
DTC - 34
MAP sensor circuit error (signal low indicating high vacuum)
DTC - 44
Oxygen sensor error (lean condition indicated)
DTC - 53 Digital EGR Valve solenoid 1 error
MAP is short for manifold absolute pressure sensor,,it senses the
manifold pressure and applies the right amount of gas with the right
amount of ignition timing so the car runs and performs well if this
does not work properly,it throws off the whole loop cycle for the
computer,,which in turn makes it run badly,,and get poor fuel
economy,,it causes one to have a lack of power,,combined with a loss of
fuel economy,,and also poor take offs,,and sometimes an occasional
stalling,,i hope this helps.
EGR system was really developed for was emissions control. the purpose
of the EGR valve is to regulate the amount of exhaust gas recirculated
back into your combustion chamber to send the gasses through another
cycle in order to eliminate any excess pollutants like NOX (nitrogen
oxides), N2 (nitrogen), O2 (oxygen), CO2(carbon dioxide) and HC
(Hydrocarbons). the EGR was also developed to lower combustion temps that's another reason why the exhaust is recirculated the exhaust gasses
will not burn therefor lowering combustion temps, because there is less
"usable" air going into the cylinders.
You should get a working egr back on the truck and you'll also need a map sensor for this vehicle to run correctly.
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