1999 Volvo P0236&P0237 Fault Codes

1 ANSWERS

1. amomipais82
   

   Hi There,
   Hopefully you have a S80 PO236 boost pressure sensor. PO237 BOOST PRESSURE SENSOR Condition
   If the control module receives a signal from the boost pressure sensor which is lower than 0.2 V (low signal) or higher than 4.85 V (high signal) it is interpreted as a fault and ECM-1600 is stored. Same as PO237
   
   Condition
   Boost pressure control runs in an open-loop, in other words set duty cycles are generated regardless of boost pressure.
   
   Possible source
   
   Signal too high:
   
   
   contact resistance in terminals
   short-circuit to supply voltage in the signal cable
   open-circuit in signal cable
   defective boost pressure sensor
   Signal too low:
   
   
   short-circuit to ground in the signal cable
   defective boost pressure sensor
   Condition, none  
   Hope it helps

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